Quinible

• (n.) An interval of a fifth; also, a part sung with such intervals.
Found on http://thinkexist.com/dictionary/meaning/quinible/

Quinible

Quin'i·ble noun [ Latin quini five each.] (Mus.) An interval of a fifth; also, a part sung with such intervals. [ Obsolete] 'He sang . . . a loud quynyble .' Chaucer.
Found on http://www.encyclo.co.uk/webster/Q/11

quinible

high-pitched voice; a musical part pitched very high
Found on http://phrontistery.info/q.html
No exact match found