per·i·sarc (p r  -särk )n. A horny external covering that encloses the polyp colonies of certain hydrozoans. [peri- + Greek sarx, sark-, flesh.] per i·sarcal, peri·sarcous adj. |
perisarc [ˈpɛrɪˌsɑːk]
n
(Life Sciences & Allied Applications / Zoology) the outer chitinous layer secreted by colonial hydrozoan coelenterates, such as species of Obelia
[from peri- + -sarc, from Greek sarx flesh]
perisarcal , perisarcous adj
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