Dictionary
Find
in
Dictionary
Thesaurus
Translations

Click to move up the list of words
Orono
Orontes
oropendola
oropharynx
orotund
Oroya fever
orphan
orphan assets
orphan site
orphanage
orpharion
Orpheus
Orphic
Orphism
orphrey
orpiment
orpine
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