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Definitions for: Normal
[n] something regarded as a normative example; "the convention of not naming the main character"; "violence is the rule not the exception"; "his formula for impressing visitors"
[adj] conforming with or constituting a norm or standard or level or type or social norm; not abnormal; "serve wine at normal room temperature"; "normal diplomatic relations"; "normal working hours"; "normal word order"; "normal curiosity"; "the normal course of events"
[adj] (psychology) being approximately average or within certain limits in e.g. intelligence and development; "a perfectly normal child"; "of normal intelligence"; "the most normal person I've ever met"
[adj] in accordance with scientific laws
[adj] (geometry) forming a right angle
Webster (1913) Definition: Nor"mal, a. [L. normalis, fr. norma rule, pattern,
carpenter's square; prob. akin to noscere to know; cf. Gr. ?
well known, ? gnomon, also, carpenter's square: cf. F.
normal. See Known, and cf. Abnormal, Enormous.]
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.
Deviations from the normal type. --Hallam.
2. (Geom.) According to a square or rule; perpendicular;
forming a right angle. Specifically: Of or pertaining to a
normal.
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 united with more than two
other carbon atoms; as, normal pentane, hexane, etc.
Cf. Iso-.
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.
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.
Nor"mal, n. [Cf. F. normale, ligne normale. See
Normal, a.]
1. (Geom.) Any perpendicular.
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.
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.
Synonyms: average, connatural, convention, formula, inborn, inbred, mean(a), median(a), modal(a), native, natural, pattern, perpendicular, regular, rule, typical
Antonyms: abnormal, paranormal
See Also: code of behavior, code of conduct, mores, practice, sane, standard
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