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tuber

[too-ber, tyoo-] Origin

tu·ber

1[too-ber, tyoo-]
noun
1.
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.
2.
Anatomy. a rounded swelling or protuberance; a tuberosity; a tubercle.

Origin:
1660–70; < Latin tūber bump, swelling. Compare truffle

tu·ber·less, adjective
tu·ber·oid, adjective

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Tuber is always a great word to know.
So is bryophytes. Does it mean:
phylum of green, nonvascular, seedless plants comprised of true mosses, hornworts and liverworts
phase in plant life which begins with a spore produced by meiosis
Dictionary.com Unabridged

tub·er

2[too-ber, tyoo-]
noun
1.
a person or thing that forms, installs, or operates with tubes.
2.
Also called inner-tuber. a person who participates in the sport of tubing.

Origin:
1920–25; tube + -er1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Collins
World English Dictionary
tuber (ˈtjuːbə)
 
n
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
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Etymonline
Word Origin & History

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

tuber tu·ber (t&oomacr;'bər, ty&oomacr;'-)
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.
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American Heritage
Science Dictionary
tuber   (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.
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