Effuses

Effuses is the third-person singular present indicative form of the verb effuse. The verb effuse means to pour forth or to emit gradually, whether a liquid, gas, or odor, or to radiate in a figurative sense, such as warmth or enthusiasm. In everyday language, something that effuses fragrance or a speaker who effuses warmth uses the verb in a literal or metaphorical sense.

In scientific contexts, the related noun effusion describes the escape of a gas through a small opening into a vacuum or lower-pressure region. The verb effuse can be used in sentences like "the gas effuses through the pinhole." The study of effusion is a topic in kinetic theory and physical chemistry; Graham's law of effusion relates the rates of effusion of different gases to their molar masses.

Etymology: Effuse derives from the Latin effundere, meaning "to pour out," through Middle French and English usage. Related forms include effusive, meaning pouring forth or emotionally demonstrative, and effusion, the act or process of effusing or an instance of an effusion (such as a medical effusion or a fragrance's release).

See also: effusion, effusive, emanation, emit, radiate.