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.
A genus of fungi. See Truffle.
A tuberosity; a tubercle.
© Webster 1913.