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Pronunciation: (tOO'bur, tyOO'-), [key]
1. Bot.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. Anat.a rounded swelling or protuberance; a tuberosity; a tubercle.


Pronunciation: (tOO'bur, tyOO'-), [key]
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.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

tube pantube railway
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