- Botany. a fleshy, usually oblong or rounded thickening or outgrowth, as the potato, of a subterranean stem or shoot, bearing minute scalelike leaves with buds or eyes in their axils from which new plants may arise.
- Anatomy. a rounded swelling or protuberance; a tuberosity; a tubercle.
Origin of tuber1
1660–70; < Latin tūber bump, swelling. Cf. truffle
Origin of tuber2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for tuber
I feel like they are the alchemist of the tuber world; they make everything from smooth, soft purees to beautiful crunchy pickles.Fresh Picks
February 23, 2010
In kitchen-gardens it is planted like the potato, the tuber being cut in pieces.The Philippine Islands
It is found in the tuber of the dahlia, in the dandelion, and some other plants.Elements of Agricultural Chemistry
All of these may be grown from seed or by division of the tuber before planting.The Book of Bulbs
Sometimes it attacks the potato, eating down the stalk into the tuber.The Moths of the British Isles, First Series
This skin is produced by the action of the surface cells of the tuber.Parallel Paths
Thomas William Rolleston
- a fleshy underground stem (as in the potato) or root (as in the dahlia) that is an organ of vegetative reproduction and food storage
- anatomy a raised area; swelling
C17: from Latin tūber hump
Word Origin and History for tuber
"thick underground stem," 1660s, from Latin tuber "lump, bump," perhaps related to tumere "to swell" (see thigh).
Online Etymology Dictionary, © 2010 Douglas Harper
- A localized rounded projection or swelling; a knob, tuberosity, or eminence.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.