Ortho is defined as straight.
An example of ortho used as a prefix is in the word orthodontist.
- straight, regular, upright: orthognathous
- at right angles, perpendicular: orthorhombic
- proper, correct, standard: orthography
- Chem.: usually italicized and hyphenated in chemical names: ortho-aminobenzoic acid
- 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
- Med. correction of deformities: orthopedics
Also (except for ortho-sense ), before a vowel, orth-
Origin of ortho-; from Classical Greek orthos, straight ; from Indo-European base an unverified form werdh-, to grow, climb, high from source Sanskrit várdhati, (he) grows
Origin of orthoFrom ortho–.
- Straight; upright; vertical: orthotropous.
- Perpendicular: orthorhombic.
- Correct; correction: orthopsychiatry.
- The most fully hydrated form of an acid or of its salts: orthoboric acid.
- Of or relating to one of three possible isomers of a benzene ring with two attached chemical groups in which the carbon atoms with attached groups are adjacent: ortho-dibromobenzene.
Origin of ortho-Middle English, from Old French, from Latin, from Greek, from orthos, straight, correct, right.
Ancient Greek á½€ÏÎ¸ÏŒÏ‚ (orthos).