or·thog·ra·phy 
(ôr-thŏgrə-fē)
(ôr-thŏgrə-fē)n. pl. or·thog·ra·phies
1. The art or study of correct spelling according to established usage.
2. The aspect of language study concerned with letters and their sequences in words.
or·thogra·pher, or·thogra·phist n.
- chemiluminescent
- chemin de fer
- chemise
- chemisette
- chemisorb
- chemisorption
- chemist
- chemistry
- Chemnitz
- chemo
- chemo-
- chemoautotroph
- chemoautotrophic
- chemoautotrophy
- chemo brain
- chemokine
- chemolithoautotroph
- chemolithoautotrophic
- chemolithoautotrophy
- chemolithotroph
- chemolithotrophic
- chemolithotrophy
- chemoprevention
- chemopreventive
- chemoprophylactic