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Definition of NORMAL

3 definitions found:



Normal \Nor"mal\ (n[^o]r"mal), a. [L. normalis, fr. norma rule, pattern, carpenter's square; prob. akin to noscere to know; cf. Gr. gnw`rimos well known, gnw`mwn gnomon, also, carpenter's square: cf. F. normal. See {Known}, and cf. {Abnormal}, {Enormous}.] [1913 Webster]
     1. According to an established norm, rule, or principle; conformed to a type, standard, or regular form; performing the proper functions; not abnormal; regular; natural; analogical. [1913 Webster]

              Deviations from the normal type.      --Hallam. [1913 Webster]

     2. (Geom.) According to a square or rule; perpendicular; forming a right angle; as, a line normal to the base. Specifically: Of or pertaining to a normal. [1913 Webster]

     3. (Chem.) Standard; original; exact; typical. Specifically: (a) (Quantitative Analysis) Denoting a solution of such strength that every cubic centimeter contains the same number of milligrams of the element in question as the number of its molecular weight. (b) (Chem.) Denoting certain hypothetical compounds, as acids from which the real acids are obtained by dehydration; thus, normal sulphuric acid and normal nitric acid are respectively {S(OH)6}, and {N(OH)5}. (c) (Organ. Chem.) Denoting that series of hydrocarbons in which no carbon atom is bound to more than two other carbon atoms; as, normal pentane, hexane, etc. Cf. {Iso-}. [1913 Webster]

     {Normal equations} (Method of Least Squares), a set of equations of the first degree equal in number to the number of unknown quantities, and derived from the observations by a specified process. The solution of the normal equations gives the most probable values of the unknown quantities.

     {Normal group} (Geol.), a group of rocks taken as a standard.
        --Lyell.

     {Normal place} (of a planet or comet) (Astron.), the apparent place in the heavens of a planet or comet at a specified time, the place having been determined by a considerable number of observations, extending perhaps over many days, and so combined that the accidental errors of observation have largely balanced each other.

     {Normal school}, a school whose methods of instruction are to serve as a model for imitation; an institution for the training of teachers. [1913 Webster]

     Syn: {Normal}, {Regular}, {Ordinary}.

     Usage: Regular and ordinary are popular terms of well-known signification; normal has now a more specific sense, arising out of its use in science. A thing is normal, or in its normal state, when strictly conformed to those principles of its constitution which mark its species or to the standard of a healthy and natural condition. It is {abnormal} when it departs from those principles. [1913 Webster]

The Collaborative International Dictionary of English v.0.48 [gcide]

Normal \Nor"mal\ (n[^o]r"mal), n. [Cf. F. normale, ligne normale. See {Normal}, a.]
     1. (Geom.) Any perpendicular.
        [1913 Webster]

     2. (Geom.) A straight line or plane drawn from any point of a curve or surface so as to be perpendicular to the curve or surface at that point. [1913 Webster]

     Note: The term normal is also used to denote the distance along the normal line from the curve to the axis of abscissas or to the center of curvature. [1913 Webster]

The Collaborative International Dictionary of English v.0.48 [gcide]

227 Moby Thesaurus words for "normal":
     academe, academia, accepted, according to Hoyle, air line, all there, alma mater, appropriate, arranged, average, axis, azimuth circle, balance, balanced, banal, beeline, besetting, bourgeois, businesslike, center, central, characteristic, chord, clearheaded, clearminded, college, college of engineering, common, commonplace, community college, compos mentis, condign, conformable, conformist, consuetudinary, conventional, correct, current, customary, decent, decorous, degree-granting institution, diagonal, diameter, direct line, directrix, distinctive, distinguishing, dominant, due, edge, epidemic, established, everyday, exemplary, familiar, fit, fitting, formal, four-year college, garden, garden-variety, general, generality, generally accepted, golden mean, good, graduate school, great-circle course, habitual, happy medium, harmonious, healthy, healthy-minded, in hand, institute of technology, intermediary, intermediate, ivied halls, journalism school, junior college, juste-milieu, kosher, law school, lucid, mean, medial, median, medical school, mediocre, mediocrity, medium, mentally sound, methodical, middle, middle course, middle ground, middle point, middle position, middle state, middle-class, middle-of-the-road, middling, midpoint, moderate, multiversity, natural, naturalistic, naturistic, nice, no great shakes, norm, normal school, normative, obtaining, of sound mind, ordered, orderly, ordinary, orthodiagonal, orthodox, orthogonal, orthometric, pandemic, par, perpendicular, plastic, plumb, popular, postgraduate school, predominant, predominating, prescribed, prescriptive, prevailing, prevalent, proper, quintessential, radius, radius vector, rampant, rational, realistic, reasonable, received, rectangular, regnant, regular, regulation, reigning, rife, right, right and proper, right angle, right line, right-angle, right-angled, right-angular, righteous, rightful, routine, rule, ruling, run, run-of-mine, run-of-the-mill, running, sample, sane, sane-minded, school of communications, school of education, secant, seemly, segment, sensible, set, shortcut, side, sound, sound-minded, stable, standard, steady, stereotyped, stock, straight, straight course, straight line, straight stretch, straightaway, streamline, suburban, suitable, symmetrical, systematic, tangent, time-honored, together, traditional, transversal, true to form, true to type, two-year college, typal, typic, typical, unexceptional, uniform, universal, university, university college, unnoteworthy, unremarkable, unspectacular, upright, usual, varsity, vector, vertical, vertical circle, via media, well-ordered, well-regulated, wholesome, widespread, wonted


Moby Thesaurus II by Grady Ward, 1.0 [moby-thesaurus]


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