tuber
Cross references: 1. bulb 2. corm tu.ber \'t(y)u:-b*r\ n [L, lump, tuber, truffle; akin to L tume-re to swell - more at TH]UMB 1a: a short fleshy usu. underground stem bearing minute scale leaves each w ith a bud in its axil potentially able to produce a new plant 1b: a fleshy root or rhizome resembling a tuber 2: an anatomical prominence : TUBEROSITY