ALL meanings of acorn worm
a·corn worm
A a - noun acorn worm any of various small burrowing marine animals of the genus Balanoglossus and related genera, having an elongated wormlike body with an acorn-shaped eversible proboscis at the head end: subphylum Hemichordata (hemichordates) 3
- noun acorn worm any of several burrowing, often brilliantly colored hemichordates of the class Enteropneusta, usually found in intertidal sand and mud, having an acorn-shaped proboscis and collar. 1
- noun acorn worm A member of a class of worms, Enteropneusta, with some chordate features. 0