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Sabbatarian :: Sabbatarian (n.) A strict observer of the Sabbath.

Autophony :: Autophony (n.) An auscultatory process, which consists in noting the tone of the observer's own voice, while he speaks, holding his head close to the patient's chest..

Observer :: Observer (n.) One who keeps any law, custom, regulation, rite, etc.; one who conforms to anything in practice..

Stereoscopic :: Stereoscope (n.) An optical instrument for giving to pictures the appearance of solid forms, as seen in nature. It combines in one, through a bending of the rays of light, two pictures, taken for the purpose from points of view a little way apart. It is furnished with two eyeglasses, and by refraction or reflection the pictures are superimposed, so as to appear as one to the observer..

Close :: Close (v. t.) Accurate; careful; precise; also, attentive; undeviating; strict; not wandering; as, a close observer..

Observership :: Observership (n.) The office or work of an observer.

Minute :: Minute (a.) Attentive to small things; paying attention to details; critical; particular; precise; as, a minute observer; minute observation..

Distinguisher :: Distinguisher (n.) One who discerns accurately the difference of things; a nice or judicious observer.

Observer :: Observer (n.) One who observes, or pays attention to, anything; especially, one engaged in, or trained to habits of, close and exact observation; as, an astronomical observer..

Heliotrope :: Heliotrope (n.) An instrument for making signals to an observer at a distance, by means of the sun's rays thrown from a mirror..

Studentry :: Student (n.) One who studies or examines in any manner; an attentive and systematic observer; as, a student of human nature, or of physical nature..

Aberration :: Aberration (n.) A small periodical change of position in the stars and other heavenly bodies, due to the combined effect of the motion of light and the motion of the observer; called annual aberration, when the observer's motion is that of the earth in its orbit, and daily or diurnal aberration, when of the earth on its axis; amounting when greatest, in the former case, to 20.4'', and in the latter, to 0.3''. Planetary aberration is that due to the motion of light and the motion of the planet re

Acute :: Acute (a.) Having nice discernment; perceiving or using minute distinctions; penetrating; clever; shrewd; -- opposed to dull or stupid; as, an acute observer; acute remarks, or reasoning..

Speculator :: Speculator (n.) One who speculates. Specifically: (a) An observer; a contemplator; hence, a spy; a watcher..

Geodetical :: Geodetical (a.) Of or pertaining to geodesy; obtained or determined by the operations of geodesy; engaged in geodesy; geodesic; as, geodetic surveying; geodetic observers..

Telemeter :: Telemeter (n.) An instrument used for measuring the distance of an object from an observer; as, a telescope with a micrometer for measuring the apparent diameter of an object whose real dimensions are known..

Shrewd :: Shrewd (superl.) Able or clever in practical affairs; sharp in business; astute; sharp-witted; sagacious; keen; as, a shrewd observer; a shrewd design; a shrewd reply..

Misobserver :: Misobserver (n.) One who misobserves; one who fails to observe properly.

Speculist :: Speculist (n.) One who observes or considers; an observer.

Observer :: Observer (n.) One who fulfills or performs; as, an observer of his promises..

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