orth-
combining form
variants or ortho-
1
: straight : upright : vertical
orthograde
2
: perpendicular
orthorhombic
3
: correct : corrective
orthodontia
4
a
: hydrated or hydroxylated to the highest degree
orthophosphoric acid
b
: involving substitution at or characterized by or having the relationship of two neighboring positions in the benzene ring
ortho-xylene
Word History
Etymology
Greek, from orthos straight, right, true; akin to Sanskrit ūrdhva high, upright
Medical Definition
orth-
prefix
variants or ortho-
1
: hydrated or hydroxylated to the highest degree
orthophosphoric acid
2
: involving substitution at or characterized by or having the relationship of two neighboring positions in the benzene ring —abbreviation o-
ortho-xylene or o-xylene
compare meta- sense 2, para- sense 2 - motiles
- motilest
- motilities
- motility
- motilones
- Motilón
- moting
- motion
- motion and time study
- motion capture
- motion picture
- motion pictures
- motion plate
- motion sickness
- motion study
- motion work
- motion-picture camera
- motion-picture projector
- motional
- motional impedance
- motioned
- motioner
- motioners
- New Learning
- New Left