A squid-like cephalopod, Spirula spirula (the only extant member of its taxonomic order), found in the deep ocean.

plural of deer horn knife

Synonym of nail-patella syndrome

plural of ram's horn squid

Cerithidea obtusa, a species of sea snail.

(topology) A pathological object, a certain embedding of a sphere in three-dimensional Euclidean space, obtained by various modifications of a torus.

plural of Alexander horned sphere

Any species of toad in the genus Xenophrys, which have a strange protuberance on their forehead.

Synonym of when you mess with the bull, you get the horns

(informal) If you provoke somebody, you can expect an aggressive reaction.