The Collaborative International Dictionary
Microsthene
Microsthene \Mi"cro*sthene\ (m[imac]"kr[-o]*sth[=e]n), n. [Micro- + Gr. sqe`nos might, strength.] (Zo["o]l.) One of a group of mammals having a small size as a typical characteristic. It includes the lower orders, as the Insectivora, Cheiroptera, Rodentia, and Edentata.
Wiktionary
microsthene
n. (context zoology chiefly in the plural English) Any of a group of mammals having a small size as a typical characteristic. It includes the lower orders, such as insectivores and rodents.