mesogloea

Century Dictionary and Cyclopedia

1. n. The mesodermal intercellular substance, or ground-substance, of some animals, as sponges and other cœlenterates.
2. n. [capitalized] A genus of gelatinous seaweeds, typical of the Mesoglæaceæ, with olive-brown branching filiform fronds. The unilocular sporangia are oval in shape and borne at the base of peripheral filaments; the plurilocular sporangia are unknown. Agardh, 1817.

GNU Webster's 1913

1. n. (Zoöl.) A thin gelatinous tissue separating the ectoderm and endoderm in certain cœlenterates.