D defs.my
Entry 2 senses Webster, 1913

Tuber

/to͞oʹbə/ · Tu·ber · IPA /ˈtubɚ/
01 n. A fleshy, rounded stem or root, usually containing starchy matter, as the potato or arrowroot; a thickened root-stock. See Illust. of Tuberous.
  1. 1.
    A fleshy, rounded stem or root, usually containing starchy matter, as the potato or arrowroot; a thickened root-stock. See Illust. of Tuberous.(Bot.) See: Tuberous
  2. 2.
    A tuberosity; a tubercle.(Anat.)