ortho
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θoʊDictionary.com Unabridged
ortho-
1.
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 ).
2.
Chemistry.
a.
b.
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 (H 3 BO 3 ) and potassium orthoborate (K 3 BO 3 )); if the acid ends in -ous, the corresponding salt ends in -ite ( orthoantimonous acid (H 3 SbO 3 ) and potassium orthoantimonite (K 3 SbO 3 )).
Also, especially before a vowel, orth-.
Origin:
< Greek, combining form of orthós straight, upright, correct
< Greek, combining form of orthós straight, upright, correct
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Based on the Random House Dictionary, © Random House, Inc. 2013.
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|
Link To ortho
00:10
Ortho
is always a great word to know.
So is bezoar. Does it mean:
| the offspring of a zebra and a donkey. |
| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
Collins
World English Dictionary
| ortho- 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) Compare meta- Compare para- o- denoting an organic compound containing a benzene ring with substituents attached to adjacent carbon atoms (the 1,2- positions): orthodinitrobenzene |
| 5. | See meta- denoting an oxyacid regarded as the highest hydrated form of the anhydride or a salt of such an acid: orthophosphoric acid |
| 6. | See para- denoting a diatomic substance in which the spins of the two atoms are parallel: orthohydrogen |
| [from Greek orthos straight, right, upright] | |
| orth- or (before a vowel) orth- | |
| —combining form | |
| [from Greek orthos straight, right, upright] | |
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History
ortho-
a comb. element in forming scientific and technical words, from Gk. ortho-, stem of orthos "straight, true, correct, regular," from PIE *eredh- "high" (cf. Skt. urdhvah "high, lofty, steep," L. arduus "high, steep," O.Ir. ard "high").
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary
ortho- or orth-
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.
ortho-
Abbr. o- Of or relating to one of three possible isomers of a benzene ring with adjacent carbon atoms having attached chemical groups. Usually used in italic: 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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Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Abbreviations & Acronyms
| ORTHO American Orthopsychiatric Association |
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
The first case is called ortho, and the second para.
It is likely that ortho is being visited by the ghost of himself.
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