n. [ Gr. &unr_; wet, moist + -meter: cf. F. hygromètre. ] (Physics) An instrument for measuring the degree of moisture of the atmosphere. [ 1913 Webster ]
Daniell's hygrometer, a form of hygrometer consisting of a bent glass tube terminating in two bulbs, the one covered with muslin, the other of black glass, and containing ether and a thermometer. Ether being poured on the muslin, the black ball, cooled by the evaporation of the ether within, is soon covered with dew; at this moment, the inclosed thermometer gives the dew-point, and this, compared with the reading of one in the air, determines the humidity.
{ } a. [ Cf. F. hygrométrique. ] 1. Of or pertaining to hygrometry; made with, or according to, the hygrometer; as, hygrometric observations. [ 1913 Webster ]
2. Readily absorbing and retaining moisture; as, hygrometric substances, like potash. [ 1913 Webster ]
n. [ Cf. F. hygrométrie. ] (Physics) That branch of physics which relates to the determination of the humidity of bodies, particularly of the atmosphere, with the theory and use of the instruments constructed for this purpose. [ 1913 Webster ]
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