retractile

Two globose retractile vesicles issue from the ninth and tenth segments of those of Arctia chrysorrhea, &c.

A tubular ovipositor, consisting of several pieces often retractile within each other, like the tubes of a telescope.

Once upon a time, many, many hundred years ago, the dog did use its claws; they were then retractile.

Although they resemble cats superficially they are not directly related to them and their claws are only partly retractile.

These small palps were probably retractile, and capable of being withdrawn entirely under the hood.