ortho- in British English

or before a vowel orth-

combining form

straight or upright

orthotropous

perpendicular or at right angles

orthoclastic

correct or right

orthodontics

orthodox

orthography

orthoptics

4. (often in italics)

denoting an organic compound containing a benzene ring with substituents attached to adjacent carbon atoms (the 1,2- positions)

orthodinitrobenzene

Abbreviation: o-. Compare meta- (sense 4), Compare para-1 (sense 6)

denoting an oxyacid regarded as the highest hydrated form of the anhydride or a salt of such an acid

orthophosphoric acid

meta- (sense 6)

denoting a diatomic substance in which the spins of the two atoms are parallel

orthohydrogen

para-1 (sense 8)

Word origin

from Greek orthos straight, right, upright

ortho- in American English

(ˈɔrθoʊ; ˈɔrθə)

straight, regular, upright

orthognathous

at right angles, perpendicular

orthorhombic

proper, correct, standard

orthography

4. Chemistry

that acid (of a group containing the same nonmetallic element) which has the largest number of OH groups per atom of the nonmetal

orthophosphoric acid

characterized by substitutions in the 1, 2 position in the benzene ring

; usually italicized and hyphenated in chemical names

ortho-aminobenzoic acid

see also para-1 (sense 2) para-1 (sense 2b), meta- (sense 6) meta- (sense 6d)

5. Medicine

correction of deformities

orthopedics

), before a vowel, orth- Also (except for ortho- (sense 4) ortho- (sense 4b)

Word origin

< Gr orthos, straight < IE base *werdh-, to grow, climb, high > Sans várdhati, (he) grows

单词	ortho
释义	ortho- in British English or before a vowel orth- combining form 1. straight or upright orthotropous 2. perpendicular or at right angles orthoclastic 3. correct or right orthodontics orthodox orthography orthoptics 4. (often in italics) denoting an organic compound containing a benzene ring with substituents attached to adjacent carbon atoms (the 1,2- positions) orthodinitrobenzene Abbreviation: o-. Compare meta- (sense 4), Compare para-1 (sense 6) 5. denoting an oxyacid regarded as the highest hydrated form of the anhydride or a salt of such an acid orthophosphoric acid meta- (sense 6) 6. denoting a diatomic substance in which the spins of the two atoms are parallel orthohydrogen para-1 (sense 8) Word origin from Greek orthos straight, right, upright ortho- in American English (ˈɔrθoʊ; ˈɔrθə) 1. straight, regular, upright orthognathous 2. at right angles, perpendicular orthorhombic 3. proper, correct, standard orthography 4. Chemistry a. that acid (of a group containing the same nonmetallic element) which has the largest number of OH groups per atom of the nonmetal orthophosphoric acid b. characterized by substitutions in the 1, 2 position in the benzene ring ; usually italicized and hyphenated in chemical names ortho-aminobenzoic acid see also para-1 (sense 2) para-1 (sense 2b), meta- (sense 6) meta- (sense 6d) 5. Medicine correction of deformities orthopedics ), before a vowel, orth- Also (except for ortho- (sense 4) ortho- (sense 4b) Word origin < Gr orthos, straight < IE base *werdh-, to grow, climb, high > Sans várdhati, (he) grows Definition of 'ortho-'
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ortho- in British English

ortho- in American English

Definition of 'ortho-'