a.1.(Zool.) Of or pertaining to a region of the carapace of a crab covering the middle branchial region.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
The oyster was closely attached to the left side, covering 60 to 70% of the epibranchial surface and about 90% of the mesobranchial and metabranchial regions.
Much of the carapace surface is smooth, with scattered granules, but granules are concentrated locally on the mesobranchial, posterior slope of the cardiac, and on the anterior portion of mesogastric area.