Find the word definition

Crossword clues for aldehyde

The Collaborative International Dictionary

Aldehyde \Al"de*hyde\ ([a^]l"d[-e]*h[imac]d), n. [Abbrev. fr. alcohol dehydrogenatum, alcohol deprived of its hydrogen.]

  1. (Chem.) A colorless, mobile, and very volatile liquid obtained from alcohol by certain processes of oxidation.

  2. (Chem.) Any compound having the group -CHO. Methyl aldehyde, the simplest aldehyde, is more commonly called formaldehyde, H-CHO, and acetic aldehyde is now more commonly called acetaldehyde. The higher aldehydes may be solids. A reducing sugar typically contains the aldehyde group.

    Note: The aldehydes are intermediate between the alcohols and acids, and differ from the alcohols in having two less hydrogen atoms in the molecule, as common aldehyde (called also acetaldehyde, acetic aldehyde or ethyl aldehyde), C2H4O; methyl aldehyde (called also formaldehyde), CH2O.

    Aldehyde ammonia (Chem.), a compound formed by the union of aldehyde with ammonia.

Douglas Harper's Etymology Dictionary

first oxidation product of alcohol, 1833, discovered in 1774 by German-born Swedish chemist Carl Wilhelm Scheele (1742-1786), the name said to have been coined by German chemist Justus von Liebig (1803-1873) from abbreviation of Modern Latin alcohol dehydrogenatum "dehydrogenated alcohol."


n. (context organic chemistry English) Any of a large class of reactive organic compounds (''R''·CHO) having a carbonyl functional group attached to one hydrocarbon radical and a hydrogen atom.


n. any of a class of highly reactive chemical compounds; used in making resins and dyes and organic acids


An aldehyde or alkanal is an organic compound containing a functional group with the structure −CHO, consisting of a carbonyl center (a carbon double-bonded to oxygen) with the carbon atom also bonded to hydrogen and to an R group, which is any generic alkyl or side chain. The group—without R—is the aldehyde group, also known as the formyl group. Aldehydes are common in organic chemistry. Many fragrances are aldehydes.

Usage examples of "aldehyde".

Providence, evidently, was on the side of Joe Aldehyde and working overtime.

A year of freedom just for helping Joe Aldehyde to get his hands on Pala.

And even if Joe Aldehyde did get his concession, they could still go on making love in the style to which they were accustomed.

Neither Joe Aldehyde nor the Rani had told him of this most recent rebuff.

Lord Aldehyde has promised to back the Crusade with all his resources.

From Bahu she had learned that Will had already written to Lord Aldehyde, and within a few days a reply would doubtless be forthcoming.

Benzoic aldehyde was only moderately flammable, but the prospect of setting himself on fire with his own pipe conformed to his worst ideas of the indignity that death would one day visit upon him.

In a few minutes the hated stench of the aldehyde would have driven any bees still hanging about the comb down to the next level in the hive.

He thought it went a long way towards nullifying the effects of aldehyde loaded Vietnamese wine and beer in some fashion known only to extinct alchemists or Dupont scientists, perhaps.

The resulting atom combination, -CHO, is called an aldehyde group, for reasons we need not go into.

That, perhaps, is the particular importance of the unusual aldehyde group at carbon-18.

Antryg said softly, and a shiver went through him, although the bar, with its close-packed bodies, its smells of cigarettes and beer and synthetic aldehyde, was warm as a Jacuzzi.

If allowed to stand in a test tube, the odor of valeric aldehyde will first be noticed, then that of amyl valerate, and lastly that of valeric acid.

The aldehydes and ketones in the beer quickly dispelled any concern about the temperature of the brew.

The muscles are blood-rich and full of organic compounds, aldehydes, ketones and lactic acid.