Dictionary entry

Hydrophyllium

Webster's Dictionary 1913

‖Hy′dro‐phyl″li‐um (?), n.; pl. L. Hydrophyllia (#), E. Hydrophylliums (#). [NL., fr. Gr. ὕδωρ water + � a leaf.] (Zoöl.) One of the flat, leaflike, protective zooids, covering other zooids of certain Siphonophora.