中膠層
Mesogloea \Mes`o*gl[oe]"a\, n. [NL., fr. Gr. me`sos middle + ? a glutinous substance.] (Zo["o]l.) A thin gelatinous tissue separating the ectoderm and endoderm in certain c[oe]lenterates. -- {Mes`o*gl[oe]"al}, a.
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