English definition of Observation

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Definition of observation

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Observation (n.) Specifically, the act of measuring, with suitable instruments, some magnitude, as the time of an occultation, with a clock; the right ascension of a star, with a transit instrument and clock; the sun's altitude, or the distance of the moon from a star, with a sextant; the temperature, with a thermometer, etc..

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Close :: Close (v. t.) Out of the way observation; secluded; secret; hidden.

Watch :: Watch (v. t.) To give heed to; to observe the actions or motions of, for any purpose; to keep in view; not to lose from sight and observation; as, to watch the progress of a bill in the legislature..

Repetition :: Repetition (n.) The measurement of an angle by successive observations with a repeating instrument.

Thermoscopic :: Thermoscopic (a.) Of or pertaining to the thermoscope; made by means of the thermoscope; as, thermoscopic observations..

Outpost :: Outpost (n.) A post or station without the limits of a camp, or at a distance from the main body of an army, for observation of the enemy..

South :: South (a.) Lying toward the south; situated at the south, or in a southern direction from the point of observation or reckoning; proceeding toward the south, or coming from the south; blowing from the south; southern; as, the south pole..

Polariscopic :: Polariscopic (a.) Of or pertaining to the polariscope; obtained by the use of a polariscope; as, polariscopic observations..

Noticeable :: Noticeable (a.) Capable of being observed; worthy of notice; likely to attract observation; conspicous.

A Posteriori :: A posteriori () Characterizing that kind of reasoning which derives propositions from the observation of facts, or by generalizations from facts arrives at principles and definitions, or infers causes from effects. This is the reverse of a priori reasoning..

Megameter :: Megameter (n.) An instrument for determining longitude by observation of the stars.

Reduction :: Reduction (v. t.) The correction of observations for known errors of instruments, etc..

Autoptically :: Autoptically (adv.) By means of ocular view, or one's own observation..

Phenomenon :: Phenomenon (n.) An appearance; anything visible; whatever, in matter or spirit, is apparent to, or is apprehended by, observation; as, the phenomena of heat, light, or electricity; phenomena of imagination or memory..

Microspectroscope :: Microspectroscope (n.) A spectroscope arranged for attachment to a microscope, for observation of the spectrum of light from minute portions of any substance..

Aprosos :: Aprosos (a. & adv.) By the way; to the purpose; suitably to the place or subject; -- a word used to introduce an incidental observation, suited to the occasion, though not strictly belonging to the narration..

Theodolitic :: Theodolitic (a.) Of or pertaining to a theodolite; made by means of a theodolite; as, theodolitic observations..

Augury :: Augury (n.) A rite, ceremony, or observation of an augur..

Austromancy :: Austromancy (n.) Soothsaying, or prediction of events, from observation of the winds..

Empirical :: Empirical (a.) Pertaining to, or founded upon, experiment or experience; depending upon the observation of phenomena; versed in experiments..

Observatory :: Observatory (n.) A place or building for making observations on the heavenly bodies.