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  • English Word Optionally Definition In an optional manner.
  • English Word Optocoele Definition Alt. of Optocoelia
  • English Word Optocoelia Definition The cavity of one of the optic lobes of the brain in many animals.
  • English Word Optogram Definition An image of external objects fixed on the retina by the photochemical action of light on the visual purple. See Optography.
  • English Word Optography Definition The production of an optogram on the retina by the photochemical action of light on the visual purple; the fixation of an image in the eye. The object so photographed shows white on a purple or red background. See Visual purple, under Visual.
  • English Word Optometer Definition An instrument for measuring the distance of distinct vision, mainly for the selection of eveglasses.
  • English Word Opulence Definition Wealth; riches; affluence.
  • English Word Opulency Definition See Opulence.
  • English Word Opulent Definition Having a large estate or property; wealthy; rich; affluent; as, an opulent city; an opulent citizen.
  • English Word Opuntia Definition A genus of cactaceous plants; the prickly pear, or Indian fig.
  • English Word Opus Definition A work; specif. (Mus.), a musical composition.
  • English Word Opuscle Definition Alt. of Opuscule
  • English Word Opuscula Definition of Opusculum
  • English Word Opuscule Definition A small or petty work.
  • English Word Opusculum Definition An opuscule.
  • English Word Opye Definition Opium.
  • English Word Oquassa Definition A small, handsome trout (Salvelinus oquassa), found in some of the lakes in Maine; -- called also blueback trout.
  • English Word Or Definition A particle that marks an alternative; as, you may read or may write, -- that is, you may do one of the things at your pleasure, but not both. It corresponds to either. You may ride either to London or to Windsor. It often connects a series of words or propositions, presenting a choice of either; as, he may study law, or medicine, or divinity, or he may enter into trade.
  • English Word Or Definition Ere; before; sooner than.
  • English Word Or Definition Yellow or gold color, -- represented in drawing or engraving by small dots.
  • English Word Ora Definition A money of account among the Anglo-Saxons, valued, in the Domesday Book, at twenty pence sterling.
  • English Word Ora Definition of Os
  • English Word Orabassu Definition A South American monkey of the genus Callithrix, esp.
  • English Word Orach Definition Alt. of Orache
  • English Word Orache Definition A genus (Atriplex) of herbs or low shrubs of the Goosefoot family, most of them with a mealy surface.
  • English Word Oracle Definition The answer of a god, or some person reputed to be a god, to an inquiry respecting some affair or future event, as the success of an enterprise or battle.
  • English Word Oracle Definition Hence: The deity who was supposed to give the answer; also, the place where it was given.
  • English Word Oracle Definition The communications, revelations, or messages delivered by God to the prophets; also, the entire sacred Scriptures -- usually in the plural.
  • English Word Oracle Definition The sanctuary, or Most Holy place in the temple; also, the temple itself.
  • English Word Oracle Definition One who communicates a divine command; an angel; a prophet.