ortho

[ awr-thoh ]

/ ˈɔr θoʊ /

adjective Chemistry.

pertaining to or occupying two adjacent positions in the benzene ring.Compare meta³, para³.

Origin of ortho

First recorded in 1875–80; independent use of ortho-

Words nearby ortho

orth-, orthergasia, orthesis, orthetics, orthicon, ortho, orthoboric acid, orthocenter, orthocentre, orthocephalic, orthochorea

Definition for ortho (2 of 2)

ortho-

a combining form occurring in loanwords from Greek, where it meant “straight,” “upright,” “right,” “correct” (orthodox) and on this model used in the formation of compound words (orthopedic).

Chemistry.

a combining form used in the name of that acid in a given series of acids that contains the most water (orthoboric acid).Compare meta-, pyro-.
a combining form used in the names of the salts of these acids: if the acid ends in -ic, the corresponding salt ends in -ate (orthoboric acid (H3BO3) and potassium orthoborate (K3BO3)); if the acid ends in -ous, the corresponding salt ends in -ite (orthoantimonous acid (H3SbO3) and potassium orthoantimonite (K3SbO3)).

Also especially before a vowel, orth-.

Origin of ortho-

<Greek, combining form of orthós straight, upright, correct

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for ortho

Ortho Sol makes precision screws for the most delicate of construction projects: spinal fusion.
Patients Screwed in Spine Surgery ‘Scam’|The Center for Investigative Reporting|November 3, 2014|DAILY BEAST
Mr. Tal- mage, true to the fawning, cringing spirit of ortho- doxy, lauds the living queen and cruelly maligns the genius dead.
The Works of Robert G. Ingersoll, Vol. 5 (of 12)|Robert G. Ingersoll
The influence of position of an alkyl in the aromatic bodies is well shown in ortho-, para- and meta-derivatives.
Poisons: Their Effects and Detection|Alexander Wynter Blyth
This change only occurs when the halogen atom is in the ortho- or para- position to the -N2- group.
Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 4|Various

The ortho- and para-nitro-benzoic acids can be obtained by oxidizing ortho-and para-nitro-cinnamic acids.
Encyclopaedia Britannica, 11th Edition, Volume 3, Slice 6|Various
The ortho molecules rotate with odd rotational quantum numbers, while the para molecules rotate with even quantum numbers.
Unwise Child|Gordon Randall Garrett

British Dictionary definitions for ortho

ortho-

before a vowel orth-

combining form

straight or uprightorthotropous

perpendicular or at right anglesorthoclastic

correct or rightorthodontics; orthodox; orthography; orthoptics

(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 oarsman Compare oarsman

denoting an oxyacid regarded as the highest hydrated form of the anhydride or a salt of such an acidorthophosphoric acid See meta- (def. 6)

denoting a diatomic substance in which the spins of the two atoms are parallelorthohydrogen See para- 1 (def. 8)

Word Origin for ortho-

from Greek orthos straight, right, upright

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for ortho

ortho-

pref.

Straight; upright; vertical:orthotropic.

Correct; correction:orthopsychiatry.

Hydrated form of an acid or of its salts:orthoboric acid.

Diatomic molecules in which the nuclei have the same direction of spin:orthohydrogen.

Of or relating to one of three possible isomers of a benzene ring with adjacent carbon atoms having attached chemical groups:ortho-dibromobenzene.

单词	ortho
释义	ortho [ awr-thoh ] / ˈɔr θoʊ / adjective Chemistry. pertaining to or occupying two adjacent positions in the benzene ring.Compare meta³, para³. Origin of ortho First recorded in 1875–80; independent use of ortho- Words nearby ortho orth-, orthergasia, orthesis, orthetics, orthicon, ortho, orthoboric acid, orthocenter, orthocentre, orthocephalic, orthochorea Definition for ortho (2 of 2) ortho- a combining form occurring in loanwords from Greek, where it meant “straight,” “upright,” “right,” “correct” (orthodox) and on this model used in the formation of compound words (orthopedic). Chemistry. a combining form used in the name of that acid in a given series of acids that contains the most water (orthoboric acid).Compare meta-, pyro-. a combining form used in the names of the salts of these acids: if the acid ends in -ic, the corresponding salt ends in -ate (orthoboric acid (H3BO3) and potassium orthoborate (K3BO3)); if the acid ends in -ous, the corresponding salt ends in -ite (orthoantimonous acid (H3SbO3) and potassium orthoantimonite (K3SbO3)). Also especially before a vowel, orth-. Origin of ortho- <Greek, combining form of orthós straight, upright, correct Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for ortho Ortho Sol makes precision screws for the most delicate of construction projects: spinal fusion. Patients Screwed in Spine Surgery ‘Scam’\|The Center for Investigative Reporting\|November 3, 2014\|DAILY BEAST Mr. Tal- mage, true to the fawning, cringing spirit of ortho- doxy, lauds the living queen and cruelly maligns the genius dead. The Works of Robert G. Ingersoll, Vol. 5 (of 12)\|Robert G. Ingersoll The influence of position of an alkyl in the aromatic bodies is well shown in ortho-, para- and meta-derivatives. Poisons: Their Effects and Detection\|Alexander Wynter Blyth This change only occurs when the halogen atom is in the ortho- or para- position to the -N2- group. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 4\|Various The ortho- and para-nitro-benzoic acids can be obtained by oxidizing ortho-and para-nitro-cinnamic acids. Encyclopaedia Britannica, 11th Edition, Volume 3, Slice 6\|Various The ortho molecules rotate with odd rotational quantum numbers, while the para molecules rotate with even quantum numbers. Unwise Child\|Gordon Randall Garrett British Dictionary definitions for ortho ortho- before a vowel orth- combining form straight or uprightorthotropous perpendicular or at right anglesorthoclastic correct or rightorthodontics; orthodox; orthography; orthoptics (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 oarsman Compare oarsman denoting an oxyacid regarded as the highest hydrated form of the anhydride or a salt of such an acidorthophosphoric acid See meta- (def. 6) denoting a diatomic substance in which the spins of the two atoms are parallelorthohydrogen See para- 1 (def. 8) Word Origin for ortho- from Greek orthos straight, right, upright Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Medical definitions for ortho ortho- pref. Straight; upright; vertical:orthotropic. Correct; correction:orthopsychiatry. Hydrated form of an acid or of its salts:orthoboric acid. Diatomic molecules in which the nuclei have the same direction of spin:orthohydrogen. Of or relating to one of three possible isomers of a benzene ring with adjacent carbon atoms having attached chemical groups:ortho-dibromobenzene. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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