Tu"ni*cle (?), n. [L. tunicula a little tunic, coat, or membrane, dim. of tunica a tunic: cf. OF. tunicle.]
1.
A slight natural covering; an integument.
The tunicles that make the ball or apple of the eye.
Holland.
2. R. C. Ch.
A short, close-fitting vestment worn by bishops under the dalmatic, and by subdeacons.
© Webster 1913.