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noun, plural U's or Us, u's or us.
1.
the 21st letter of the English alphabet, a vowel.
2.
3.
something having the shape of a U.
4.
a written or printed representation of the letter U or u.
5.
a device, as a printer's type, for reproducing the letter U or u.
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noun
a Burmese title of respect applicable to a man: used before the proper name.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Link To US'
Etymonline
Word Origin & History
u
for historical evolution, see V. Used punningly for you by 1588 ["Love's Labour's Lost," V.i.60], not long after the pronunciation shift that made the vowel a homonym of the pronoun. As a simple shorthand (without intentional word-play), it is recorded
EXPANDfrom 1862. Common in business abbreviations since 1923 (e.g. U-Haul, attested from 1951).
COLLAPSE
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary
U 3
The symbol for the element uranium.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
U
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uranium  (y -rā'nē-əm) Pronunciation Key
Symbol U A heavy, silvery-white, highly toxic, radioactive metallic element of the actinide series. It has 14 known isotopes, of which U 238 is the most naturally abundant, occurring in several minerals. Fissionable isotopes, especially U 235, are used in nuclear reactors and nuclear weapons. Atomic number 92; atomic weight 238.03; melting point 1,132°C; boiling point 3,818°C; specific gravity 18.95; valence 2, 3, 4, 5, 6. See Periodic Table. |
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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