'Tuber' definitions:

Definition of 'tuber'

(from WordNet)
noun
A fleshy underground stem or root serving for reproductive and food storage
noun
Type genus of the Tuberaceae: fungi whose fruiting bodies are typically truffles [syn: Tuber, genus Tuber]

Definition of 'Tuber'

From: GCIDE
  • Tuber \Tu"ber\, n.[L., a hump. knob; probably akin to tumere to swell. Cf. Tumid.]
  • 1. (Bot.) (a) A fleshy, rounded stem or root, usually containing starchy matter, as the potato or arrowroot; a thickened root-stock. See Illust. of Tuberous. (b) A genus of fungi. See Truffle. [1913 Webster]
  • 2. (Anat.) A tuberosity; a tubercle. [1913 Webster]