Oyster crab(Zoöl.) a small crab (Pinnotheres ostreum) which lives as a commensal in the gill cavity of the oyster.Oyster dredge, a rake or small dragnet of bringing up oyster from the bottom of the sea.Oyster fish. (Zoöl.) (a) The tautog. (b) The toadfish. Oyster plant. (Bot.) (a) A plant of the genus Tragopogon the root of which, when cooked, somewhat resembles the oyster in taste; salsify; — called also vegetable oyster. (b) A plant found on the seacoast of Northern Europe, America and Asia the fresh leaves of which have a strong flavor of oysters.Oyster plover. (Zoöl.) Same as Oyster catcher, above.Oyster shell(Zoöl.), the shell of an oyster. Oyster wench, Oyster wife, Oyster women, a women who deals in oysters.Pearl oyster. (Zoöl.) See under Pearl.Thorny oyster(Zoöl.), any spiny marine shell of the genus Spondylus.

(Oys"ter-green`) n. (Bot.) A green membranous seaweed (Ulva) often found growing on oysters but common on stones, piles, etc.

(Oys"ter*ing), n. Gathering, or dredging for, oysters.

(Oys"ter*ling) n. (Zoöl.) A young oyster.

(O*ze"na) n. [NL., fr. L. ozaena, Gr. 'o`zaina, fr. 'o`zein to smell.] (Med.) A discharge of fetid matter from the nostril, particularly if associated with ulceration of the soft parts and disease of the bones of the nose.

(O`zo*ce"rite) n. [Gr. 'o`zein to smell + wax.] (Min.) A waxlike mineral resin; — sometimes called native paraffin, and mineral wax.

(O`zo*na"tion) n. (Chem.) The act of treating with ozone; also, the act of converting into, or producing, ozone; ozonization.

(O"zone) n. [Gr. 'o`zwn smelling, p. pr. of 'o`zein to smell. See Odor.] (Chem.) A colorless gaseous substance (O) obtained (as by the silent discharge of electricity in oxygen) as an allotropic form of oxygen, containing three atoms in the molecule. It is a streng oxidizer, and probably exists in the air, though by he ordinary tests it is liable to be confused with certain other substances, as hydrogen dioxide, or certain oxides of nitrogen. It derives its name from its peculiar odor, which resembles that of weak chlorine.

(O*zon"ic) a. (Chem.) Pertaining to, resembling, or containing, ozone.

(O*zo`ni*fi*ca"tion) n. [Ozone + L. -ficare to make. See fy. ] (Chem.) The act or process of producing, or of subjecting to the action of, ozone.

(O`zo*ni*za"tion) n. (Chem.) Ozonation.

(O"zo*nize) v. t. [imp. & p. p. Ozonized ; p. pr. & vb. n. Ozonizing.] (Chem.) (a) To convert into ozone, as oxygen. (b) To treat with ozone.

(O"zo*ni`zer) n. (Chem.) An apparatus or agent for the production or application of ozone.

(O`zo*nom"e*ter) n. [Ozone + -meter.] An instrument for ascertaining the amount of ozone in the atmosphere, or in any gaseous mixture. Faraday.

(O`zo*no*met"ric) a. (Chem.) Pertaining to, or used for, the determination of the amount of ozone; of or relating to ozonometry.

(O`zo*nom"e*try) n. (Chem.) The measurement or determination of the quantity of ozone.

species (H. ostralegus), the common American species and the California, or black, oyster catcher (H. Bachmani) are the best known.

  By PanEris using Melati.

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