Word Study
gastrotricha
CIDE DICTIONARY
gastrotricha, n. pl. [NL., fr. Gr. belly + , , hair.].
A group of small wormlike animals, having cilia on the ventral side. The group is regarded as an ancestral or synthetic one, related to rotifers and annelids. [1913 Webster]
For further exploring for "gastrotricha" in Webster Dictionary Online