Pro-tū'ber-ance, n.

n. [Fr. protubérance, Sp. protuberancia, It. protuberanza. See infra.] That which is protuberant; a swelling or tumor on the body; a prominence; a bunch or knob; any thing swelled or pushed beyond the surrounding or adjacent surface.

Synonyms—PROJECTION, PROTUBERANCE. Protuberance differs from projection, being applied to parts that rise from the surface with a gradual ascent or small angle; whereas a projection may be at a right angle with the surface.