Used with words of Greek origin. / middle-sized / intermediate / (chemistry) Designating an achiral member of a group of diastereoisomers that has at least one chiral member

plural of meso-region

An administrative system that is equivalent to a prefecture or a department. It is used in Brazil as a third-level administration between state and micro-region.

plural of mesoband

(geology) A boundary between bands of minerals

plural of mesoangioblast

(biology) A mesenchymal-like cell associated with the walls of the large vessels.

(zoology) Of or pertaining to a region of the carapace of a crab covering the middle branchial region.

(geology) The era from 3,200 Ma to 2,800 Ma.

(geology) Of a geologic era within the Archaean eon from about 3200 to 2800 million years ago; stromatolites have existed from this time.