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normal

 - 8 dictionary results

nor⋅mal

  [nawr-muhl]
Use normal in a Sentence
–adjective
1. conforming to the standard or the common type; usual; not abnormal; regular; natural.
2. serving to establish a standard.
3. Psychology.
a. approximately average in any psychological trait, as intelligence, personality, or emotional adjustment.
b. free from any mental disorder; sane.
4. Biology, Medicine/Medical.
a. free from any infection or other form of disease or malformation, or from experimental therapy or manipulation.
b. of natural occurrence.
5. Mathematics.
a. being at right angles, as a line; perpendicular.
b. of the nature of or pertaining to a mathematical normal.
c. (of an orthogonal system of real functions) defined so that the integral of the square of the absolute value of any function is 1.
d. (of a topological space) having the property that corresponding to every pair of disjoint closed sets are two disjoint open sets, each containing one of the closed sets.
e. (of a subgroup) having the property that the same set of elements results when all the elements of the subgroup are operated on consistently on the left and consistently on the right by any element of the group; invariant.
6. Chemistry.
a. (of a solution) containing one equivalent weight of the constituent in question in one liter of solution.
b. pertaining to an aliphatic hydrocarbon having a straight unbranched carbon chain, each carbon atom of which is joined to no more than two other carbon atoms.
c. of or pertaining to a neutral salt in which any replaceable hydroxyl groups or hydrogen atoms have been replaced by other groups or atoms, as sodium sulfate, Na2SO4.
–noun
7. the average or mean: Production may fall below normal.
8. the standard or type.
9. Mathematics.
a. a perpendicular line or plane, esp. one perpendicular to a tangent line of a curve, or a tangent plane of a surface, at the point of contact.
b. the portion of this perpendicular line included between its point of contact with the curve and the x-axis.
Origin:
1520–30; < L normālis made according to a carpenter's square, equiv. to norm(a) (see norm ) + -ālis -al 1

Related forms:
nor⋅mal⋅i⋅ty, nor⋅mal⋅ness, noun

Nor⋅mal

  [nawr-muhl]
–noun
a city in central Illinois. 35,672.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To normal
nor·mal   (nôr'məl)   
adj.  

  1. Conforming with, adhering to, or constituting a norm, standard, pattern, level, or type; typical: normal room temperature; one's normal weight; normal diplomatic relations.

  2. Biology Functioning or occurring in a natural way; lacking observable abnormalities or deficiencies.

  3. Abbr. n or N Chemistry

    1. Designating a solution having one gram equivalent weight of solute per liter of solution.

    2. Designating an aliphatic hydrocarbon having a straight and unbranched chain of carbon atoms.

    3. Being at right angles; perpendicular.

    4. Perpendicular to the direction of a tangent line to a curve or a tangent plane to a surface.

    5. Relating to or characterized by average intelligence or development.

    6. Free from mental illness; sane.

  4. Mathematics

    1. Being at right angles; perpendicular.

    2. Perpendicular to the direction of a tangent line to a curve or a tangent plane to a surface.

    3. Relating to or characterized by average intelligence or development.

    4. Free from mental illness; sane.

    1. Relating to or characterized by average intelligence or development.

    2. Free from mental illness; sane.

n.  

  1. Something normal; the standard: scored close to the normal.

  2. The usual or expected state, form, amount, or degree.

    1. Correspondence to a norm.

    2. An average.

  4. Mathematics A perpendicular, especially a perpendicular to a line tangent to a plane curve or to a plane tangent to a space curve.


[Middle English, from Late Latin normālis, from Latin, made according to the square, from norma, carpenter's square; see gnō- in Indo-European roots.]
nor'mal·ly adv.
Nor·mal   (nôr'məl)   
A town of central Illinois north-northeast of Bloomington. It is the seat of Illinois State University (founded 1857). Population: 50,700.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

normal 
1650, "standing at a right angle," from L.L. normalis "in conformity with rule, normal," from L. normalis "made according to a carpenter's square," from norma "rule, pattern," lit. "carpenter's square" (see norm). Meaning "conformingt to common standards, usual" is from 1828. Normalcy is first attested 1857, originally as a mathematical term; normality is first attested 1849. Normal school (1834) is from Fr. école normale (1794), a republican foundation.
Online Etymology Dictionary, © 2001 Douglas Harper
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Medical Dictionary

Main Entry: 1nor·mal
Pronunciation: 'nor-m&l
Function: adjective
1 a : according with, constituting, or not deviating from anorm, rule, or principle b : conforming to a type, standard, or regular pattern
2 : occurring naturally and not because of disease, inoculation, or anyexperimental treatment <normal immunity>
3 a : of, relating to, or characterized by average intelligence or development b : free from mental disorder : SANE c : characterized by balanced well-integrated functioning of the organism as a whole
4a of a solution : having a concentration of one gram equivalent of solute per liter b : containing neither basic hydrogen nor acid hydrogen <normalphosphate of silver> c : not associated <normal molecules> d : having a straight-chain structure <normal pentane> <normal butylalcohol> —nor·mal·ly /'nor-m&-lE/ adverb

Main Entry: 2normal
Function: noun
: a subject who is normal
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

normal nor·mal (nôr'məl)
adj.

  1. Conforming with, adhering to, or constituting a norm, standard, pattern, level, or type; typical.

  2. Functioning or occurring in a natural way; lacking observable abnormalities or deficiencies.

  3. Occurring naturally and not because of disease, inoculation, or any experimental treatment. Used of immunity.

  4. Of, relating to, or being a solution having one gram equivalent weight of solute per liter of solution.

  5. Of, relating to, or being an aliphatic hydrocarbon having a straight and unbranched chain of carbon atoms.

  6. Of, relating to, or characterized by average intelligence or development.

n.
The usual or the expected state, form, amount, or degree.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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