The Collaborative International Dictionary
Plumularias
Plumularia \Plu`mu*la"ri*a\, n.; pl. L. Plumularl[ae], E. Plumularias. [NL.] (Zo["o]l.) Any hydroid belonging to Plumularia and other genera of the family Plumularid[ae]. They generally grow in plumelike forms.
Wiktionary
plumularias
n. (plural of plumularia English)