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Webster 1913 Edition

Noun.

[

Hydra

+ Gr. [GREEK] a flower.]

(Zool.)

One of the nutritive zooids of a hydroid colony. Also applied to the proboscis or manubrium of a hydroid medusa. See Illust. of

hydranth ‎(plural hydranths)

(zoology) An individual polyp of a hydroid colony
- 1970, Sylvan Meryl Rose, Regeneration, page 126:
  NM Stevens (1902) and Emil Godlewski (1904) described the transformation of pieces of stem to hydranths in the marine hydroid.