act of decreasing in length

the branch of the biological sciences dealing with the functioning of organisms

an abnormal and usually permanent contraction of a muscle

a sustained muscular contraction resulting from a rapid series of nerve impulses

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

painless contractions of the muscles of the uterus that continue throughout pregnancy with increasing frequency

muscular contraction that causes the vagina to close; usually an anxiety reaction before coitus or pelvic examination

the branch of the biological sciences dealing with the functioning of organisms