Definitions for "Hydroid"
the water conducting cells of bryophytes; compare to leptoid
An elongate, non-lignified water conducting xylem cell in some bryophytes. Analogous with tracheids in vascular plants.
Related to, or resembling, the hydra; of or pertaining to the Hydroidea.
colonial coelenterates having the polyp phase dominant
highly branched, colonial group of invertebrate organisms, closely related to sea anemones
Keywords:  one
One of the Hydroideas.