[al-dawl, -dol]
noun Chemistry.
Also called acetaldol. a colorless, syrupy, water-soluble liquid, C 4 H 8 O 2 , formed by the condensation of acetaldehyde: used chiefly in the manufacture of rubber vulcanizers and accelerators, and in perfumery.
any of a class of compounds containing both an alcohol and an aldehyde functional group, formed by a condensation reaction between aldehyde or ketone molecules.

1870–75; ald(ehyde) + -ol Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
aldol (ˈældɒl)
1.  Systematic name: 3-hydroxybutanal a colourless or yellowish oily liquid, miscible with water, used in the manufacture of rubber accelerators, as an organic solvent, in perfume, and as a hypnotic and sedative. Formula: CH3CHOHCH2CHO
2.  any organic compound containing the functional group -CHOHCH2CHO
3.  (modifier) consisting of, containing, or concerned with the group -CHOHCH2CHO: aldol group or radical; aldol reaction
[C19: from ald(ehyde) + -ol1]

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American Heritage
Medical Dictionary

aldol al·dol (āl'dôl, -dōl)

  1. A thick, colorless to pale yellow liquid obtained from acetaldehyde and used in perfumery and as a solvent.

  2. A similar aldehyde containing the group CH3OH-CO-CHOH.

The American Heritage® Stedman's Medical Dictionary
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