Zool. any of the feeding individuals (zooids) of a hydroid colony
Origin of hydranth; from hydr(o)- + Classical Greek anthos, a flower: see antho-
A feeding zooid in a hydroid colony having an oral opening surrounded by tentacles.
Origin of hydranthhydr(a) + Greek anthos, flower.
From hydra + -anth (“flower”), thus "hydra blossom".