The Collaborative International Dictionary
Sarcoseptum
Sarcoseptum \Sar`co*sep"tum\, n.; pl. Sarcosepta. [Sarco- + septum.] (Zo["o]l.) One of the mesenteries of an anthozoan.
Wiktionary
sarcoseptum
n. (context zoology English) One of the mesentery of an anthozoan.