Involution

(in-vo-lu’ ’-shun) [involvere, to roll upon]. I. A turning or rolling inward. 2. The retrogre ive change to their normal condition that certain organs undergo after fulfilling their functional purposes. I. of the Uterus, the return of the uterus after gestation to its normal weight and condition. I.- forms, a term applied to microorganisms that have undergone degenerative changes as a result of unfavorable environment. 340