Most species have sharp, curved claws, often retractile between some of the lamellae or into a special sheath.
Tentacular -um: retractile processes on the larvae of Lepidoptera.
So the retractile wings were as good as eleven years ago—you hoped.
The vermiform and retractile tongue is also a most singular organ.
Organs, consisting of two retractile pieces, issuing from the Mammul, and rendering the threads.
The animal has a well-developed foot, a retractile proboscis, eyes situated upon the tentacles, and a fairly long siphon.
In Stenus this organ is retractile, and consists of two joints.
The retractile boring organs are club-shaped, each supporting about 1600 hooks.
In all these genera the foot is small, its retractile muscles numerous, and the byssus large.
The proper stings which inflict the wound: retractile within the sheath, externally serrulate at the apex.
retractile re·trac·tile (rĭ-trāk'tĭl, -tīl')
That can be drawn back or in, as the claws of a cat.