Letter I

Involute

1. Literally, to turn inward or roll inward.

2. To decrease in size after an enlargement.

The uterus involutes after pregnancy.

The thymus involutes after adolescence.

3. To undergo a retrograde change.

After treatment, a tumor may involute.

4. To shrink physically and emotionally with advancing age.

From the Latin involutio, from in- meaning into + volvere meaning to roll.

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