ortho

¹ American  

[awr-thoh] / ˈɔr θoʊ /

adjective

Chemistry.

1. pertaining to or occupying two adjacent positions in the benzene ring.

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ortho- ² American  

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.

   1. a combining form used in the name of that acid in a given series of acids that contains the most water (orthoboric acid ).

   2. 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 BO3 ) and potassium orthoborate (K 3 BO3 )); if the acid ends in -ous, the corresponding salt ends in -ite (orthoantimonous acid (H 3 SbO3 ) and potassium orthoantimonite (K 3 SbO3 )).

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ortho- British  

combining form

1. straight or upright

   orthotropous

2. perpendicular or at right angles

   orthoclastic

3. correct or right

   orthodontics

   orthodox

   orthography

   orthoptics

4.  o-.  (often in italics) denoting an organic compound containing a benzene ring with substituents attached to adjacent carbon atoms (the 1,2- positions) Compare oarsman Compare oarsman

   orthodinitrobenzene

5. denoting an oxyacid regarded as the highest hydrated form of the anhydride or a salt of such an acid See meta-

   orthophosphoric acid

6. denoting a diatomic substance in which the spins of the two atoms are parallel See para- 1

   orthohydrogen

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Etymology

Origin of ortho¹

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

Origin of ortho-¹

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

Example Sentences

A day later, a “progress report” states, “Ortho consult in AM anticipating need for eventual amputation.”

From Los Angeles Times

“My suspicion is — and I’m dealing here with incomplete information — if he doesn’t get an infection in his leg and he doesn’t get arthritis in his ankle, I think he will definitely play golf again,” said Mallon, who played on the tour from 1975 to 1979 and was later a surgeon at Emerge Ortho and a clinical professor at Duke University School of Medicine.

From Washington Post

Quest relies on tests made by Abbott, Ortho Clinical and Euroimmun.

From Seattle Times

Three lab-based tests have been approved for use, from Roche, Abbott and Cardiff-based Ortho, which has the advantage of manufacturing in the UK and also scored 100% specificity in its test – meaning it does not confuse antibodies from Covid with antibodies from other coronaviruses including the common cold.

From The Guardian

The FDA has issued emergency-use authorizations to four companies for tests to detect whether people have had the coronavirus infection: Cellex, Chembio Diagnostic Systems, Ortho Clinical Diagnostics and the Mount Sinai Laboratory.

From Washington Times