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la1

[lah]
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noun Music.
  1. the syllable used for the sixth tone of a diatonic scale.
  2. (in the fixed system of solmization) the tone A.Compare sol-fa(def 1).
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Origin of la1

Middle English word dating back to 1350–1400; see origin at gamut
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for las

la1

noun
  1. music a variant spelling of lah
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la2

interjection
  1. an exclamation of surprise or emphasis
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Word Origin

Old English lo

la3

the internet domain name for
  1. Lao People's Democratic Republic
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La

the chemical symbol for
  1. lanthanum
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LA

abbreviation for
  1. Legislative Assembly
  2. Library Association
  3. local agent
  4. Los Angeles
  5. Louisiana
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for las

la

musical note (sixth note of the diatonic scale), early 14c., see gamut. It represents the initial syllable of Latin labii "of the lips."

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Online Etymology Dictionary, © 2010 Douglas Harper

las in Medicine

La

  1. The symbol for the elementlanthanum

las in Science

La