cho·ris·ter 
(kôrĭ-stər, kŏr-)
(kôrĭ-stər, kŏr-)n.
1. A singer in a choir, especially a choirboy or choirgirl.
2. A leader of a choir.
[Middle English queristre, from Anglo-Norman *cueristre, from Medieval Latin chorista, from chorus, chorus, from Latin, choral dance; see CHORUS.]
- third eye
- third eyelid
- third force
- thirdhand
- third home
- third house
- thirdly
- third man
- third market
- Third Order
- third party
- third person
- third-person
- third quantum number
- third quarter moon
- third rail
- third-rate
- Third Reich
- third-stream
- third stream
- Third World
- Third-World
- Third Worlder
- thirst
- cryptobiosis