aldehyde: meaning, definition, pronunciation and examples
LowTechnical / Scientific
Quick answer
What does “aldehyde” mean?
A highly reactive organic compound containing a formyl group (-CHO), often characterized by its pungent odour.
Audio
Pronunciation
Definition
Meaning and Definition
A highly reactive organic compound containing a formyl group (-CHO), often characterized by its pungent odour.
In industrial and biochemical contexts, the term broadly refers to a class of compounds derived by oxidation of alcohols, significant in manufacturing, metabolism, and organic synthesis.
Dialectal Variation
British vs American Usage
Differences
No significant spelling or usage differences. Pronunciation differs slightly (see IPA).
Connotations
Identical technical connotations in both varieties.
Frequency
Equally low frequency in both dialects, confined to specialised fields.
Grammar
How to Use “aldehyde” in a Sentence
[aldehyde] + [of] + [source compound][reaction] + [yields/produces] + [aldehyde][aldehyde] + [derivative]Vocabulary
Collocations
Examples
Examples of “aldehyde” in a Sentence
verb
British English
- The enzyme will aldehyde the substrate. (Note: Extremely rare and non-standard; no common verb form exists.)
American English
- The process aldehydes the primary alcohol. (Note: Extremely rare and non-standard; no common verb form exists.)
adverb
British English
- (No standard adverbial form exists.)
American English
- (No standard adverbial form exists.)
adjective
British English
- The aldehyde fraction was collected for analysis.
- They detected an aldehyde odour in the lab.
American English
- The aldehyde solution was stored in the fridge.
- We identified an aldehyde functional group in the sample.
Usage
Meaning in Context
Business
Used in chemical industry reports, material safety data sheets (MSDS), and supply chain discussions for solvents or resins.
Academic
Core term in organic chemistry, biochemistry (e.g., lipid peroxidation), and pharmacology lectures and textbooks.
Everyday
Virtually never used. May appear on product labels (e.g., 'formaldehyde-free').
Technical
Precise term in laboratory synthesis, analytical chemistry (e.g., GC-MS), and industrial process descriptions.
Vocabulary
Synonyms of “aldehyde”
Neutral
Weak
Vocabulary
Antonyms of “aldehyde”
Watch out
Common Mistakes When Using “aldehyde”
- Mispronouncing as /ˈældəhaɪd/ (missing the second 'i' sound in the British variant).
- Confusing it with 'alkaloid' (a different class of nitrogenous compounds).
FAQ
Frequently Asked Questions
It depends on the specific compound. Some, like formaldehyde, are toxic and carcinogenic, while others occur naturally in foods (e.g., vanillin).
Both have a carbonyl group (C=O). In an aldehyde, the carbonyl carbon is bonded to at least one hydrogen. In a ketone, the carbonyl carbon is bonded to two carbon atoms.
In very small amounts in some flavours and fragrances (e.g., cinnamaldehyde in cinnamon), in disinfectants (formalin), and as products of combustion in vehicle exhaust.
The carbon of the carbonyl group is electrophilic (electron-deficient) due to the polar double bond with oxygen, making it susceptible to attack by nucleophiles. The presence of the hydrogen also makes aldehydes easier to oxidise than ketones.
A highly reactive organic compound containing a formyl group (-CHO), often characterized by its pungent odour.
Aldehyde is usually technical / scientific in register.
Aldehyde: in British English it is pronounced /ˈældɪhaɪd/, and in American English it is pronounced /ˈældəˌhaɪd/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “No idioms exist for this term.”
Learning
Memory Aids
Mnemonic
Think 'ALcohol + DEHYDrogenated' → ALDEHYDE. It's like an alcohol that lost hydrogen (through oxidation).
Conceptual Metaphor
Often conceptualised as a 'reactive hub' or a 'crossroads' in organic synthesis, where many reaction pathways begin.
Practice
Quiz
Which of the following is NOT an aldehyde?