Dwine, dwīn, v.i. to pine: (Scot.) to waste away. [A.S. dwínan, to fade; cf. Ice. dvína, Dan. tvine, to pine away.]

Dyad, dī′ad, n. a pair of units treated as one: (chem.) an atom, radical, or element having a combining power of two units: (biol.) a secondary unit of organisation consisting of an aggregate of monads.—adj. Dyad′ic.

Dyak, dī′ak, n. the Malay name for the race who constitute the bulk of the aboriginal population of Borneo, divided into innumerable tribes, differing pretty widely in language, customs, and degrees of savageness.—Also Day′ak.

Dye, dī, n. (Spens.). Same as Die (2).

Dye, dī, v.t. to stain: to give a new colour to:—pr.p. dye′ing; pa.p. dyed.—n. colour: tinge: stain: a colouring liquid.—ns. Dye′-house, a building in which dyeing is done; Dye′ing, the art of imparting colours to textile and other materials, such as cotton, silk, wool, and leather; Dy′er, one whose trade is to dye cloth, &c.; Dy′er's-broom, a European shrubby plant, thoroughly naturalised in some parts of North America—a well-known source of yellow colouring matter; Dy′er's-weed, the woad, weld, or yellow weed, yielding a yellow dye; Dye′-stuff, material used in dyeing; Dye′-wood, any wood from which material is obtained for dyeing; Dye′-work, an establishment for dyeing. [A.S. deágan, to dye, from deág or deáh, colour.]

Dying, dī′ing, pr.p. of Die.—adj. destined for death: mortal: declining: occurring immediately before death, as dying words: supporting a dying person, as a dying-bed: pertaining to death.—n. death.—adv. Dy′ingly.—n. Dy′ingness.—Dying declaration (law), the declaration made by a person convinced of his impending death, and who does not expect to survive the trial of the accused. [See Die (1).]

Dyke. Same as Dike.

Dynactinometer, din-ak-tin-om′e-tėr, n. an instrument for measuring the actinic force of light. [Gr. dynamis, force, aktis, aktinos, a ray, metron, a measure.]

Dynam, dī′nam, n. a unit of work, a foot-pound: the resultant of all the forces acting on a body.

Dynameter, dī-nam′e-tėr, n. an instrument for measuring the magnifying power of a telescope.—adj. Dynamet′rical, pertaining to a dynameter. [Gr. dynamis, power, and metron, a measure.]