Defn: An electric wave meter.

ONDOYANT On`do`yant", a. [F., p.pr. of ondoyer to undulate, fr. onde wave, L. unda.] (Art)

Defn: Wavy; having the surface marked by waves or slightly depressed furrows; as, ondoyant glass.

-ONE -one. Etym: [From Gr. -w`nh, signifying, female descendant.] (Chem.)

Defn: A suffix indicating that the substance, in the name of which it appears, is a ketone; as, acetone.

-ONE -one.(Chem.)

Defn: A termination indicating that the hydrocarbon to the name of which it is affixed belongs to the fourth series of hydrocarbons, or the third series of unsaturated hydrocarbonsl as, nonone.

ONE One, a. Etym: [OE. one, on, an, AS. än; akin to D. een, OS. ën, OFries. ën, än, G. ein, Dan. een, Sw. en, Icel. einn, Goth. ains, W. un, Ir. & Gael. aon, L. unus, earlier oinos, oenos, Gr. ëka. The same word as the indefinite article a, an. sq. root 299. Cf. 2d A, 1st An, Alone, Anon, Any, None, Nonce, Only, Onion, Unit.]

1. Being a single unit, or entire being or thing, and no more; not multifold; single; individual. The dream of Pharaoh is one. Gen. xli. 25. O that we now had here But one ten thousand of those men in England. Shak.

2. Denoting a person or thing conceived or spoken of indefinitely; a certain. "I am the sister of one Claudio" [Shak.], that is, of a certain man named Claudio.