spicular

In zoology:

Having the form or character of a spicule; resembling a spicule; dart-like; spiculiform; spiculate.

Containing or composed of spicules; spiculous; spiculiferous or spiculigenous: as, a spicular integument; the spicular skeleton of a sponge or radiolarian.

Resembling a dart; having sharp points.

Of, pertaining to, or formed from spicules