Botany . a fleshy, usually oblong or rounded thickening or outgrowth, as the potato, of a subterranean stem or shoot, bearing minute scalelike leaves with buds or eyes in their axils from which new plants may arise.

Anatomy . a rounded swelling or protuberance; a tuberosity; a tubercle.

noun

spore , beet , bulb , jalap , potato , protuberance , root , salep , stem , swelling , taro , turnip , yam