contraction [ kən'trækʃən] n．收缩
contraction/strategic withdrawal strategy 收缩/战略性撤退战略
Contraction of front and side parts as cells die off was observed in some subjects in their thirties, but it was still not evident in some sixty and seventy-year-olds.
有的人(大脑)前部和侧部的收缩——随着细胞的死亡——在三十多岁时就能被观察到了，但是也有些人直到六七岁依然不明显。
The findings show in general terms that contraction of the brain begins sooner in people in the country than in the towns.
研究结果表明在农村的人大脑收缩基本上比城市里的人要早。
害病 contraction
{adj: clonic} of or relating to abnormal neuromuscular activity characterized by rapidly alternating muscle contraction and relaxation
"clonic spasm"
{adj: convulsive, spasmodic, spastic} affected by involuntary jerky muscular contractions; resembling a spasm
"convulsive motions"
"his body made a spasmodic jerk"
"spastic movements"
{adj: isometric} of or involving muscular contraction in which tension increases while length remains constant
<-> isotonic
{adj: isotonic} of or involving muscular contraction in which tension is constant while length changes
<-> isometric
{adj: muscular} of or relating to or consisting of muscle
"muscular contraction"
{adj: tonic} of or relating to or producing normal tone or tonus in muscles or tissue
"a tonic reflex"
"tonic muscle contraction"
{n: Braxton-Hicks contraction, false labor} painless contractions of the muscles of the uterus that continue throughout pregnancy with increasing frequency
{n: abducens muscle, lateral rectus muscle, lateral rectus, rectus lateralis} the ocular muscle whose contraction turns the eyeball outward
{n: actomyosin} a protein complex in muscle fibers; composed of myosin and actin; shortens when stimulated and causes muscle contractions
{n: afterpains} pains felt by a woman after her baby is born; associated with contractions of the uterus
{n: alpha receptor, alpha-adrenergic receptor, alpha-adrenoceptor} receptors postulated to exist on nerve cell membranes of the sympathetic nervous system in order to explain the specificity of certain agents that affect only some sympathetic activities (such as vasoconstriction and relaxation of intestinal muscles and contraction of smooth muscles)
{n: amrinone, Inocor} a drug (trade name Inocor) used intravenously in heart failure; increases strength of contraction of myocardium
{n: astringent, astringent drug, styptic} a drug that causes contraction of body tissues and canals
{n: ballistocardiograph, cardiograph} a medical instrument that measures the mechanical force of cardiac contractions and the amount of blood passing through the heart during a specified period by measuring the recoil of the body as blood is pumped from the ventricles
{n: beta blocker, beta-adrenergic blocker, beta-adrenergic blocking agent} any of various drugs used in treating hypertension or arrhythmia; decreases force and rate of heart contractions by blocking beta-adrenergic receptors of the autonomic nervous system
{n: botulinum toxin A, Botox} a neurotoxin (trade name Botox) that is used clinically in small quantities to treat strabismus and facial spasms and other neurological disorders characterized by abnormal muscle contractions; is also used by cosmetic surgeons to smooth frown lines temporarily
{n: calcium blocker, calcium-channel blocker} any of a class of drugs that block the flow of the electrolyte calcium (either in nerve cell conduction or smooth muscle contraction of the heart); has been used in the treatment of angina or arrhythmia or hypertension or migraine
{n: cardiac arrhythmia, arrhythmia} an abnormal rate of muscle contractions in the heart
{n: cardiac muscle, heart muscle} the muscle tissue of the heart; adapted to continued rhythmic contraction
{n: cardiograph, electrocardiograph} medical instrument that records electric currents associated with contractions of the heart
{n: clonus} convulsion characterized by alternating contractions and relaxations
{n: compression, condensation, contraction} the process or result of becoming smaller or pressed together
"the contraction of a gas on cooling"
{n: contraction, muscular contraction, muscle contraction} (physiology) a shortening or tensing of a part or organ (especially of a muscle or muscle fiber)
{n: contraction} a word formed from two or more words by omitting or combining some sounds
"`won't' is a contraction of `will not'"
"`o'clock' is a contraction of `of the clock'"
{n: contraction} the act of decreasing (something) in size or volume or quantity or scope
<-> expansion
{n: contracture} an abnormal and usually permanent contraction of a muscle
{n: convulsion} violent uncontrollable contractions of muscles
{n: creatine, creatin} an amino acid that does not occur in proteins but is found in the muscle tissue of vertebrates both in the free form and as phosphocreatine; supplies energy for muscle contraction
{n: deflation} a contraction of economic activity resulting in a decline of prices
<-> inflation, disinflation
{n: diastole} the widening of the chambers of the heart between two contractions when the chambers fill with blood
{n: diastolic pressure} the blood pressure (as measured by a sphygmomanometer) after the contraction of the heart while the chambers of the heart refill with blood
{n: effector} a nerve fiber that terminates on a muscle or gland and stimulates contraction or secretion
{n: electromyogram, EMG} a graphical record of electric currents associated with muscle contractions
{n: electronic fetal monitor, electronic foetal monitor, fetal monitor, foetal monitor} an electronic monitor that monitors fetal heartbeat and the mother's uterine contractions during childbirth
{n: ergonovine, Ergotrate Maleate} an alkaloid derived from ergot (trade name Ergotrate Maleate) that is less toxic than ergot; induces muscular contraction of the uterus and is administered after childbirth or abortion
{n: expansion, enlargement} the act of increasing (something) in size or volume or quantity or scope
<-> contraction
{n: extensor muscle, extensor} a skeletal muscle whose contraction extends or stretches a body part
<-> flexor
{n: flexor muscle, flexor} a skeletal muscle whose contraction bends a joint
<-> extensor
{n: gas, gaseous state} the state of matter distinguished from the solid and liquid states by: relatively low density and viscosity; relatively great expansion and contraction with changes in pressure and temperature; the ability to diffuse readily; and the spontaneous tendency to become distributed uniformly throughout any container
{n: headache, head ache, cephalalgia} pain in the head caused by dilation of cerebral arteries or muscle contractions or a reaction to drugs
{n: heart, pump, ticker} the hollow muscular organ located behind the sternum and between the lungs; its rhythmic contractions move the blood through the body
"he stood still, his heart thumping wildly"
{n: inferior rectus muscle, inferior rectus, rectus inferior} the ocular muscle whose contraction turns the eyeball down and medially
{n: isometrics, isometric exercise} muscle-building exercises (or a system of musclebuilding exercises) involving muscular contractions against resistance without movement (the muscles contracts but the length of the muscle does not change)
{n: labor pain} pain and discomfort associated with contractions of the uterus during labor
{n: laryngismus} laryngeal spasm caused by the sudden contraction of laryngeal muscles
{n: light reflex, pupillary reflex, miosis, myosis} reflex contraction of the sphincter muscle of the iris in response to a bright light (or certain drugs) causing the pupil to become smaller
{n: medial rectus muscle, medial rectus, rectus medialis} the ocular muscle whose contraction turns the eyeball medially
{n: myotonia} abnormally long muscular contractions; slow relaxation of a muscle after a contraction
{n: oxytocic, oxytocic drug} a drug that induces labor by stimulating contractions of the muscles of the uterus
{n: oxytocin, Pitocin} hormone secreted by the posterior pituitary gland (trade name Pitocin); stimulates contractions of the uterus and ejection of milk
{n: peristalsis, vermiculation} the process of wavelike muscle contractions of the alimentary tract that moves food along
<-> anastalsis
{n: phosphocreatine, creatine phosphate, creatine phosphoric acid} an organic compound of creatine and phosphoric acid; found in the muscles of vertebrates where its hydrolysis releases energy for muscular contraction
{n: premature ventricular contraction, PVC} irregularity of cardiac rhythm; recurrent occurrences can be a precursor of ventricular fibrillation
{n: pulse, pulsation, heartbeat, beat} the rhythmic contraction and expansion of the arteries with each beat of the heart
"he could feel the beat of her heart"
{n: spasm, cramp, muscle spasm} a painful and involuntary muscular contraction
{n: spastic abasia} abasia due to spastic contractions of the leg muscles
{n: stretch reflex, myotactic reflex} reflex contraction of a muscle when an attached tendon is pulled; important in maintaining erect posture
{n: superior rectus muscle, superior rectus, rectus superior} the ocular muscle whose contraction turns the eyeball upward and medially
{n: syneresis, synaeresis} the contraction of two vowels into a diphthong
{n: syneresis, synaeresis} the separation of liquid from a gel that is caused by contraction (as in cheese making)
{n: synizesis, synezesis} the contraction of chromatin towards one side of the nucleus during the prophase of meiosis
{n: systole} the contraction of the chambers of the heart (especially the ventricles) to drive blood into the aorta and pulmonary artery
{n: systolic pressure} the blood pressure (as measured by a sphygmomanometer) during the contraction of the left ventricle of the heart
{n: tetanus} a sustained muscular contraction resulting from a rapid series of nerve impulses
{n: uterine contraction} a rhythmic tightening in labor of the upper uterine musculature that contracts the size of the uterus and pushes the fetus toward the birth canal
{n: vaginismus} muscular contraction that causes the vagina to close; usually an anxiety reaction before coitus or pelvic examination
{n: ventricular fibrillation} fibrillation of heart muscles resulting in interference with rhythmic contractions of the ventricles and possibly leading to cardiac arrest
{v: defibrillate} stop the fibrillation and restore normal contractions, usually by means of electric shocks
"The patient's heart had to be defibrillated to save his life"
{v: irritate} excite to some characteristic action or condition, such as motion, contraction, or nervous impulse, by the application of a stimulus
"irritate the glands of a leaf"
The drugs work by blocking calcium from initiating muscle contractions in the heart and the walls of blood vessels. This allows blood vessels to relax, reducing blood pressure.
这种药物能够阻断钙离子运行，降低心肌收缩力，减缓血管壁收缩，从而扩张血管、降低血压。
H53.4
Visual field defects
Enlarged blind spot
Generalized contraction of visual field
Hemianop(s)ia (heteronymous)(homonymous)
Quadrant anop(s)ia
Scotoma:
. arcuate
. Bjerrum
. central
. ring
视野缺损
扩大盲点
视野全面性窄缩
半侧盲 ( 异侧的 ) ( 同侧的 )
象限盲
盲点 ：
． 弓形的
． 比杰伦型
． 中心的
． 环状的
I49.4
Other and unspecified premature depolarization
Ectopic beats
Extrasystoles
Extrasystolic arrhythmias
Premature:
. beats NOS
. contractions
其他及未明示的早期去极化
异位心跳
期外收缩
期外收缩性心律不整
早期收缩
． 其他未明示的心跳
． 收缩
K31.2
Hourglass stricture or stenosis of stomach
Excludes: congenital hourglass stomach (Q40.2)
hourglass contraction of stomach (K31.8)
葫芦型狭窄或胃狭窄
不包含 ： 先天性葫芦型胃 (Q40.2)
胃之葫芦状收缩 (K31.8)
K31.8
Other specified diseases of stomach and duodenum
Achlorhydria
Gastroptosis
Hourglass contraction of stomach
胃及十二指肠其他明示疾病
胃酸缺乏症
胃下垂
胃之葫芦状收缩
P03.6
Fetus and newborn affected by abnormal uterine contractions
Fetus or newborn affected by conditions classifiable to O62-, except O62.3
Hypertonic labour
Uterine inertia
子宫收缩异常所影响之胎儿及新生儿
可归类在 O62 ， 除了 O62.3 ， 之病况外所影响之胎儿或新
生儿
高张性生产
子宫无力
Contraction 收缩
Muscle contraction 肌肉收缩
contraction 收缩
contraction producing factor 致缩因子
收缩 contraction
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