The Collaborative International Dictionary of English v.0.48:
Tuberosity \Tu`ber*os"i*ty\, n.; pl. Tuberosities. [Cf. F. tub['e]rosit['e].] 1. The state of being tuberous. [1913 Webster] 2. An obtuse or knoblike prominence; a protuberance. [1913 Webster]WordNet (r) 3.0 (2006):
tuberosity n 1: a protuberance on a bone especially for attachment of a muscle or ligament [syn: tuberosity, tubercle, eminence]