- contraction, muscular contraction, muscle contraction - (physiology) a shortening or tensing of a part or organ (especially of a muscle or muscle fiber)
 --1 is a kind of shortening
 --1 has particulars:contracture; tetanus; uterine contraction; Braxton-Hicks contraction, false labor; vaginismus Derived form: verb contract3 
- compression, condensation, contraction - the process or result of becoming smaller or pressed together; "the contraction of a gas on cooling"
 --2 is a kind of shrinking, shrinkage
 --2 has particulars: constriction, coarctation
- 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'"
 --3 is a kind of word
 
- contraction - the act of decreasing (something) in size or volume or quantity or scope
 --4 is a kind of decrease, diminution, reduction, step-down
 Antonyms: expansion, enlargement
 Derived forms: verb contract6, verb contract7, verb contract9, verb contract4, verb contract8 
- contraction - the act of decreasing (something) in size or volume or quantity or scope