main·frame 
(mānfrām′)
(mānfrām′)n.
A large powerful computer, often serving many connected terminals and usually used by large complex organizations.
- retroactive
- retroactively
- retroactivity
- retrocede
- retrocession
- re-trod
- re-trodden
- retroelement
- retrofire
- retrofit
- Aristophanes of Byzantium
- Aristotelean
- Aristotelian
- Aristotelianism
- Aristotelian logic
- Aristotle
- Aristotle Socrates
- arithmetic
- arithmetically
- arithmetician
- arithmetic mean
- arithmetic progression
- arity
- -arium
- Arius