n. [ Gr. &unr_; wet, moist, and &unr_; to show. ] (Physics) A form of hygrometer having wet and dry bulb thermometers, with an adjustable index showing directly the percentage of moisture in the air, etc. [ 1913 Webster ]

n. [ Gr. &unr_; wet + -graph. ] (Physics) An instrument for recording automatically the variations of the humidity of the atmosphere. [ 1913 Webster ]

n. [ Gr. &unr_; wet + -logy: cf. F. hygrologie. ] (Med.) The science which treats of the fluids of the body. [ 1913 Webster ]

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 ]

a. [ Gr. &unr_; wet + &unr_; to show. ] Having such a structure as to be diaphanous when moist, and opaque when dry. [ 1913 Webster ]

a. [ Gr. &unr_; wet + E. ophthalmic. ] (Anat.) Serving to moisten the eye; -- sometimes applied to the lachrymal ducts. [ 1913 Webster ]

n. [ Gr. &unr_; wet + &unr_; form, mold. ] (Biol.) The fluid portion of the cell protoplasm, in opposition to stereoplasm, the solid or insoluble portion. The latter is supposed to be partly nutritive and partly composed of idioplasm. [ 1913 Webster ]

n. [ Gr. &unr_; wet + -scope: cf. F. hygroscope. ] (Physics) An instrument which shows whether there is more or less moisture in the atmosphere, without indicating its amount. [ 1913 Webster ]