torulus tor·u·lus (tôr'yə-ləs)
n. pl. tor·u·li (-lī)
A minute elevation in the skin.
The base of the Scapus, by which it inosculates in the torulus, often subglobose, and looking like a distinct joint.
torulus: the basal socket joint of the antenna upon which the organ is articulated for movement in all directions.