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In biochemistry, a symbol used as a prefix to indicate the spatial configuration of certain organic compounds with asymmetric carbon atoms. It is used if an organic compound has a configuration about an asymmetric carbon atom analogous to that of L-glyceraldehyde (the arbitrarily chosen standard), in which the hydroxy (OH) functional group is on the left side of the asymmetric carbon atom in a Fischer projection formula: an L-amino acid.
The symbol for levorotatory.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
n., pl. Ls L's, ls or l's.
1. the 12th letter of the English alphabet, a consonant.
2. any spoken sound represented by this letter.
3. something shaped like an L.
4. a written or printed representation of the letter L or l.
n., pl. L's Ls.
7. Brit. pound.
[< Latin lībra]
1. the 12th in order or in a series.
2. (sometimes l.c.) the Roman numeral for 50. Compare Roman numerals.
(of a molecule) having a configuration resembling the levorotatory isomer of glyceraldehyde: printed as a small capital, roman character (disting. from d-).
levorotatory; levo- (disting. from d-).
9. leu; lei.
10. lev; leva.
[< Latin liber]
13. lira; lire.
17. stage left.
pl. ll., line.
pl. ll., line.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.