Definition of microthermic in US English:

microthermic

adjective

Ecology
rare
  • = microtherm.

Origin

Early 20th century; earliest use found in William Fisher (1846–1910). From microtherm + -ic, in quot. 1903 translating German mikrotherm.

Pronunciation

microthermic

/ˌmʌɪkrə(ʊ)ˈθəːmɪk/