Ortho

English

Alternative forms

• orth- (before vowel)

Etymology

From Ancient Greek ὀρθός (orthós).

Prefix

ortho-

1. Straight, right, proper. synonym ▲Synonym: recti-

ortho**doxyortho**graphyortho**pedics

2. (chemistry) Having an extra proportion of water.
3. (organic chemistry) in isomeric benzene derivatives, having the two substituents in adjacent (2,6) positions (compare meta- and para-).
4. (physics) of any molecule of the form X₂ in which the two nuclei have parallel spin.

Derived terms

English terms prefixed with ortho-

• orthocenter
• orthodontist
• orthodox
• orthographic
• ortholinear
• orthometric
• orthopedics
• orthotic
• orthotist

Anagrams

• Rooth, thoro

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