(n.) An unnatural development or growth, such as a wart or tumor; anything growing out unnaturally from anything else\; a preternatural or morbid development; hence, a troublesome superfluity; an encumbrance; as, an excrescence on the body, or on a plant.

anaglyph bellying boldness boss bulging cameo cameo glass cavo-rilievo cut glass embossment eminence excrescence excrescency extrusion gibbosity gibbousness glyph glyptograph high relief intaglio intaglio rilevato intaglio rilievo low relief mask medal medallion plaquette projection prominence protrusion protuberance protuberancy relief relievo salience salient sculptured glass tuberosity tuberousness