RAREFACTION


Meaning of RAREFACTION in English

[ ˌrɛ:rɪ'fakʃ(ə)n ]

■ noun reduction of the density of something, especially air or a gas.

Origin

C17: from med. L. rarefactio(n-) , from rarefacere 'grow thin, become rare'.

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.