What is "mesotype"

Mesotype \Mes"o*type\, n. [Meso- + -type: cf. F. m['e]sotype.] (Min.) An old term covering natrolite or soda mesolite, scolecite or lime mesotype, and mesolite or lime-soda mesotype.

n. (context mineralogy obsolete English) Any of various minerals, including natrolite (soda mesotype), scolecite (lime mesotype), and mesolite (lime-soda mesotype).

Mesotype is a genus of moth in the family Geometridae. It is sometimes included in Perizoma.