Usually in form Mesogloia. A genus of brown algae (family Chordariaceae); an alga of this genus.
In coelenterates and ctenophores: a layer between the endoderm and the ectoderm, lacking organized cellular structure and often gelatinous in consistency.
Mid 19th century; earliest use found in Miles Berkeley (1803–1889), Church of England clergyman and naturalist. From scientific Latin Mesogloia, genus name from meso- + ancient Greek γλοίος glutinous substance.