1 [too-ber, tyoo-]
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.

1660–70; < Latin tūber bump, swelling. Cf. truffle

tuberless, adjective
tuberoid, adjective Unabridged


2 [too-ber, tyoo-]
a person or thing that forms, installs, or operates with tubes.
Also called inner-tuber. a person who participates in the sport of tubing.

1920–25; tube + -er1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To tubers
World English Dictionary
tuber (ˈtjuːbə)
1.  a fleshy underground stem (as in the potato) or root (as in the dahlia) that is an organ of vegetative reproduction and food storage
2.  anatomy a raised area; swelling
[C17: from Latin tūber hump]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Word Origin & History

"thick underground stem," 1668, from L. tuber "lump, bump," perhaps related to tumere "to swell" (see thigh).
Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
American Heritage
Medical Dictionary

tuber tu·ber (tōō'bər, tyōō'-)
n. pl. tubers or tu·ber·a (-bər-ə)
A localized rounded projection or swelling; a knob, tuberosity, or eminence.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
American Heritage
Science Dictionary
tuber  [%PREMIUM_LINK%]     (t'bər)  Pronunciation Key 
The thickened part of an underground stem of a plant, such as the potato, bearing buds from which new plant shoots arise. Compare bulb, corm, rhizome, runner.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Example sentences
Or you can come to shop and place your order for tubers for next spring.
Once heated, the rocks can cook meat, vegetables and tubers wrapped in leaves.
Divers enter the water upriver and float downriver, doing little more than
  watching fish and avoiding the tubers on the surface.
More recently, the significance of underground tubers has been highlighted.
Copyright © 2014, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature