contractions
A2CEFR level
10/100Rarity: common
TechnicalRegister
The rhythmic tightening and shortening of the uterine muscle that dilates the cervix and pushes the baby out.
Her contractions were coming every three minutes and lasting a minute each.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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