a. Obs. rare–1. [ad. late L. tūberānt-em (Appuleius), f. tūber, TUBER2: see -ANT.] Swelling out, protruding, protuberant.

1

1668.  Culpepper & Cole, Barthol. Anat., I. xiv. 33. The tuberant or bossie part of the Liver.

2