<anatomy> Outside of any tube, used specifically in relation to the auditory (eustachian) or uterine (fallopian) tubes. ... (05 Mar 2000) ... 
(eks″trә-too´bәl) outside a tube.
Type: Term Pronunciation: eks′tră-tū′băl Definitions: 1. Outside any tube; specifically, not in the auditory (eustachian) or uterine (fallopian) tubes.