tri·he·dron 
(trī-hēdrən)
(trī-hēdrən)n. pl. tri·he·drons or tri·he·dra (-drə)
A figure formed by three planes meeting at a point. Also called trihedral.
- chokepoint
- choke point
- Stephen Edwin
- Stephen Fuller
- Stephen Gerald
- (Stephen) Grover
- Stephen Harold
- Stephen I
- Stephen Jay
- Stephen Joseph
- Stephen Joshua
- Stephen Michael
- Stephen of Blois
- Stephens
- Stephens
- Stephen Samuel
- Stephenson
- Stephen William
- step in
- step-in
- stepladder
- stepmother
- step on it
- step on someone's toes
- step on toes