tuber1

[too-ber, tyoo-] /ˈtu bər, ˈtyu-/
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 of tuber1
1660-70; < Latin tūber bump, swelling. Cf. truffle
Related forms
tuberless, adjective
tuberoid, adjective

tuber2

[too-ber, tyoo-] /ˈtu bər, ˈtyu-/
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
Examples from the web for tuber
  • These days they usually use cornstarch, sometimes tuber starch.
  • Effects of pre-plant and in-season nitrogen management practices on tuber yield and quality of two potato cultivars.
British Dictionary definitions for tuber

tuber

/ˈtjuːbə/
noun
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
Word Origin
C17: from Latin tūber hump
Word Origin and History for tuber
n.

"thick underground stem," 1660s, from Latin tuber "lump, bump," perhaps related to tumere "to swell" (see thigh).

tuber in Medicine

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.

tuber in Science
tuber
(t'bər)
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.