invaginate

Meanings

1. sheathed
2. Having one portion of a hollow organ drawn back within another portion.

1. To fold up or enclose into a sheath-like or pouch-like structure, either naturally or as part of a surgical procedure.
2. To turn or fold inwardly.
3. To fold inward to create a hollow space where none had existed, as with a gastrula forming from a blastula.

Etymology

From Medieval Latin invāgīnātus, past participle of Medieval Latin invāgīnāre, from in- + vāgīna (“sheath”).