A burrowing wormlike marine animal of shallow waters. Its body consists of a proboscis, a collar, and a long trunk with gill slits, and contains a structure resembling a notochord.
柱头虫，栎实虫
Class Enteropneusta, phylum Hemichordata
Example sentencesExamples
These coils often seen on the sand have been processed by the acorn worm.
The cilia on the larvae of acorn worms capture algae.
An acorn worm isn't much more than a thin, cylindrical bag with a head and collar resembling an acorn.
Pterobranchs as very different from acorn worms; they form colonies in which the individuals are interconnected by stems, or stolons.
Definition of acorn worm in US English:
acorn worm
noun
A burrowing wormlike marine animal of shallow waters. Its body consists of a proboscis, a collar, and a long trunk with gill slits, and contains a structure resembling a notochord.
柱头虫，栎实虫
Class Enteropneusta, phylum Hemichordata
Example sentencesExamples
Pterobranchs as very different from acorn worms; they form colonies in which the individuals are interconnected by stems, or stolons.
An acorn worm isn't much more than a thin, cylindrical bag with a head and collar resembling an acorn.
The cilia on the larvae of acorn worms capture algae.
These coils often seen on the sand have been processed by the acorn worm.