PROTUBERANCE
bulge, bump, hump, swelling, gibbosity, gibbousness, jut, prominence, protuberance, protrusion, extrusion, excrescence
(noun) something that bulges out or is protuberant or projects from its surroundings; “the gun in his pocket made an obvious bulge”; “the hump of a camel”; “he stood on the rocky prominence”; “the occipital protuberance was well developed”; “the bony excrescence between its horns”
protuberance
(noun) the condition of being protuberant; the condition of bulging out; “the protuberance of his belly”
Source: WordNet® 3.1
Etymology
Noun
protuberance (plural protuberances)
A bulge, knob, swelling, spine or anything that protrudes.
Synonyms: bulge, bump, protrusion
Source: Wiktionary
Pro*tu"ber*ance, n. Etym: [Cf. F. protubérance. See Protuberant.]
Definition: That which is protuberant swelled or pushed beyond the
surrounding or adjacent surface; a swelling or tumor on the body; a
prominence; a bunch or knob; an elevation. Solar protuberances
(Astron.), certain rose-colored masses on the limb of the sun which
are seen to extend beyond the edge of the moon at the time of a solar
eclipse. They may be discovered with the spectroscope on any clear
day. Called also solar prominences. See Illust. in Append.
Syn.
– 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.
Source: Webster’s Unabridged Dictionary 1913 Edition