contractional

noun

1. a contracting or being contracted
2. the shortening and thickening of a muscle fiber or a muscle in action, esp. of the uterus during labor
3. Gram.
   1. the shortening of a word or phrase by the omission of one or more sounds or letters
   2. a word form resulting from this (Ex.: she's for she is, aren't for are not)
4. Econ. a period of decrease in business activity