rarefy Copy link Outline 1. extĕnuo, 12. rārĕfăcio, 3 (rare; and hardly to be adopted) • rarefy: 1. extĕnuo, 1: the r.'d air is carried up aloft, but when condensed it is gathered into clouds, aer extenuatus sublime fertur, concretus autem in nubes cogitur, Cic. N. D. 2, 39, 101. 2. rārĕfăcio, 3 (rare; and hardly to be adopted): the heat loosens and r.'s all the earthen materials of the vessel, calor conlaxat rareque facit lateramina vasis, Lucr. 6, 233: the sun with his rays has r.'d the earth, sol radiis terram rarefecit, ib. 6, 870: it would avail nothing for hot fire to be condensed or r.'d, nil prodesset calidum denserier ignem nec rarefieri, ib. 1, 647. To become rarefied: rāresco, 3: the liquid of water becomes r.'d by the heat of the sun, aquai humor rarescit ab aestu solis, ib. 6, 875. (Usu. better, extenuari.)
RAREFY Copy link • RAREFYrarefacere: to be rarefied, rarescere (of clouds, moisture, etc.): extenuari: rarefied air, aer extenuatus.