ortho
Origin of ortho
1Words Nearby ortho
Other definitions for ortho- (2 of 2)
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 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)).
Origin of ortho-
2- Also especially before a vowel, orth-.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
How to use ortho in a sentence
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 | THE DAILY BEASTAnd also those that contain norgestimate, which include ortho-Cyclen and Tri-Cyclen.
Birth Control Made My Hair Fall Out, and I’m Not the Only One | Molly Oswaks | October 14, 2014 | THE DAILY BEASTThe 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 BlythThe ortho molecules rotate with odd rotational quantum numbers, while the para molecules rotate with even quantum numbers.
Unwise Child | Gordon Randall GarrettThis block is of the ortho-cerite stratum of Drummond Island.
Summary Narrative of an Exploratory Expedition to the Sources of the Mississippi River, in 1820 | Henry Rowe Schoolcraft
This substance readily yields ortho-oxybenzoic acid or salicylic acid, which on nitration yields two mononitro-oxybenzoic acids.
It is well known that di-ortho-substituted benzoic acids are esterified with difficulty.
British Dictionary definitions for ortho-
straight or upright: orthotropous
perpendicular or at right angles: orthoclastic
correct or right: orthodontics; orthodox; orthography; orthoptics
denoting an oxyacid regarded as the highest hydrated form of the anhydride or a salt of such an acid: orthophosphoric acid See meta- (def. 6)
denoting a diatomic substance in which the spins of the two atoms are parallel: orthohydrogen See para- 1 (def. 8)
Origin of ortho-
1Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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