noun
: a thin sheet of endoderm extending from the gastric cavity to the circular canal between adjacent radial canals in a medusa and separated from the ectoderm on either side by mesoglea
noun
: a thin sheet of endoderm extending from the gastric cavity to the circular canal between adjacent radial canals in a medusa and separated from the ectoderm on either side by mesoglea
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012