tuber Meaning, Definition & Usage

  1. noun a fleshy underground stem or root serving for reproductive and food storage
  2. noun type genus of the Tuberaceae: fungi whose fruiting bodies are typically truffles
    genus Tuber.

WordNet

Tu"ber noun
Etymology
L., a hump. knob; probably akin to tumere to swell. Cf. Tumid.
Definitions
  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.
  2. (Anat.) A tuberosity; a tubercle.

Webster 1913