Pneumonyssus
noun
Pneu·mo·nys·sus
| \ ˌn(y)ü-mə-ˈnis-əs
\
\
Medical Definition of Pneumonyssus
: a genus of mites (family Halarachnidae) that live in the air passages of mammals and include one (P. caninum) found in dogs and another (P. simicola) found in monkeys