1、con- "together" + tract- + -ion.
- contraction (n.)
- late 14c., "action of making a contract" (especially of marriage), also "action of shrinking or shortening," from Old French contraction (13c.), or directly from Latin contractionem (nominative contractio), noun of action from past participle stem of contrahere (see contract (n.)). Meaning "action of acquiring (a disease) is from c. 1600. Grammatical sense is from 1706; meaning "a contracted word or words" is from 1755. Contractions of the uterus in labor of childbirth attested from 1962.
- 1. The contraction of muscles uses energy and releases heat.
- 2. the expansion and contraction of the metal
- 3. Contraction of the timbers left gaps in the fence.
- 4. The forces of expansion are balanced by forces of contraction.
- 5. "It's" (with an apostrophe) should be used only as a contraction for "it is".
[ contraction 造句 ]