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Definitions

formaldehyde

[fawr-mal-duh-hahyd, fer-] / fɔrˈmæl dəˌhaɪd, fər- /
NOUN
preservative
Synonyms


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Preserved in formaldehyde and paraffin wax, they come from patients treated at the UK's national bowel hospital, St Mark's, in northwest London.

From Barron's • Feb. 4, 2026

Last year, formaldehyde was identified in an FAA-funded study as repeatedly exceeding occupational exposure guidelines even when low amounts of oil mixes into the air supply.

From The Wall Street Journal • Dec. 22, 2025

In particular, they cited the government’s evaluation of chemicals including formaldehyde, inorganic arsenic and hexavalent chromium, which can be used or created by industrial processes.

From Los Angeles Times • Jul. 25, 2025

Non-biodegradable coffins are often made with harmful chemicals and bodies are embalmed using formaldehyde: a toxic substance which can leach into soil.

From BBC • Dec. 14, 2024

“Only, you know, without the formaldehyde smell this time.”

From "Far from the Tree" by Robin Benway