[C]medicala movement of a muscle in which it becomes tighter, especially the strong painful movement of the muscles of a woman's womb that help to push a baby out during birth (尤指分娩时子宫的)收缩,挛缩
[C]linguisticsa word made by leaving out a letter or letters of a word or words. For example ‘can't' is a contraction of the word ‘cannot'. 缩约词,缩约形式(如can’ 是cannot 的缩约形式)