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OPAC'ITY, n. [L. opacitas.] 1. Opakeness; the quality of a body which renders it...
O'PACATE, v.t. [L. opaco.] To shade; to darken; to obscure; to cloud. [Not used.]
OOZ'Y, a. Miry; containing soft mud; resembling ooze; as the oozy bed of a river.
OOZ'ING, ppr. Flowing gently; percolating.
OOZE, v.i. ooz. [The origin of this word is not easily ascertained. Heb. See Iss...
O'OLITE, n. [Gr. an egg, and stone, from its resemblance to the roes of fish.] E...
ON'YX, n. [Gr. a nail. L. onyx.] A semi-pellucid gem with variously colored zone...
ON'YCHA, n. [from Gr.] Supposed to be the odoriferous shell of the onyxfish, or ...
ON'WARD, adv. [L. versus.] 1. Toward the point before or in front; forward; prog...
ONTOL'OGY, n. [Gr. from and discourse.] That part of the science of metaphysics ...
ONTOL'OGIST, n. One who treats of or considers the nature and qualities of being...
ONTOLOG'IC ONTOLOG'ICAL, a. [See Ontology .] Pertaining to the science of being ...
ONSLAUGHT, n. on'slaut. [on and slay.] Attack; storm; onset. [Not used.]
ON'SET, n. [on and set.] 1. A rushing or setting upon; a violent attack; assault...
ON'OMATOPE, ON'OMATOPY, n. [Gr. name, and to make.] 1. In grammar and rhetoric, ...
ONOMAN'TIC, ONOMAN'TICAL, a. Predicting by names, or the letters composing names.