The Collaborative International Dictionary
Phycomater
Phycomater \Phy`co*ma"ter\, n. [NL., fr. Gr. ? seaweed + L. mater mother.] (Bot.) A gelatin in which the alg[ae] spores have been supposed to vegetate.
Wiktionary
phycomater
n. (context obsolete English) A gelatin in which the algae spores have been supposed to vegetate.