Definition of momentaneous in English:

momentaneous

adjective

  • 1Lasting only a moment; momentary (Linguistics, with reference to the time taken to perform the action expressed by a verb).

  • 2Mathematics. Designating the increment in the value of a time-varying quantity that occurs in an infinitesimal period of time. Compare "moment", "momentary". Now historical.

Origin

Late Middle English; earliest use found in John Lydgate (c1370–c1449), poet and prior of Hatfield Regis. From post-classical Latin momentaneus momentary (Vetus Latina), instantaneous + -ous.

Pronunciation

momentaneous

/ˌməʊm(ə)nˈteɪnɪəs/