Hy`dro*cy"a*nide(?), n. (Chem.) A compound of hydrocyanic acid with a base; -- distinguished from a cyanide, in which only the cyanogen so combines.
Hy`dro*dy*nam"ic*al(?), } a. [Hydro-, 1 + dynamic, -ical: cf. F. hydrodynamique.] Pertaining to, or derived from, the dynamical action of water of a liquid; of or pertaining to water power.
Hydrodynamic friction, friction produced by the viscosity of a liquid in motion.
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