Dictionary
Find
in
Dictionary
Thesaurus
Translations

Click to move up the list of words
orpine
Orpington
orrery
orris
orrisroot
ort
ortanique
orth.
ortho-
orthocenter
orthochromatic
orthoclase
orthodontics
Orthodox
orthodox
Orthodox Church
Orthodox Judaism
Click to move down the list of words
Also available:

World English Dictionary
Dictionnaire Français

ortho-

ortho-


prefix 
Definition:
 
1. correct; correction, straightening
orthography
orthodontics

2. straight, upright, vertical
orthotropous

3. perpendicular
orthorhombic

4. fully hydrated or hydroxylated
orthophosphate

[Via French and Latin< Greek orthos "straight, right"]
Advertisement

© 2009 Microsoft