A tubercle is a small, rounded bump or growth on a bone, tissue, or organ in the body. It can be found in various parts of the body and may be a sign of a medical condition or infection. Full definition
The long head originates (starts) on the infraglenoid tubercle of the scapula which means that is crosses the shoulder joint. (all-about-arm-exercises.com)
They're called Montgomery tubercles, designed to help lubricate your nipples once baby is here and ready to nurse. (thebump.com)
Munich researchers have now found that the bony tubercles on the heads of many species fluoresce under UV light and form impressive patterns. (sciencedaily.com)