formaldehyde
noun
form·al·de·hyde
fȯr-ˈmal-də-ˌhīd 
fər-
: a colorless pungent irritating gas CH2O used chiefly in aqueous solution as a disinfectant and preservative and in chemical synthesis
Examples of formaldehyde in a Sentence
Recent Examples on the Web
Many of these products are essentially plastic dishes made from melamine-formaldehyde resin containing bamboo filler.
—
Hannah Millington, MSNBC Newsweek, 14 Nov. 2025
On safety and environment, Li said the company’s fermentation and formulations avoid aniline, formaldehyde, and heavy metals.
—Angela Velasquez, Sourcing Journal, 11 Nov. 2025
Clean fashion follows in the footsteps of clean beauty, which had a significant rise in the early 2010s when brands such as Beautycounter began formulating products free from chemicals like parabens and formaldehyde — widely linked to health issues spanning from hormone disruption to cancer.
—Sophie Benson, Vogue, 30 Oct. 2025
It was formulated free of typical eye irritants, including parabens, formaldehydes, phthalates, mineral oil, and contained less than one percent synthetic fragrance.
—Essence, 28 Oct. 2025
See All Example Sentences for formaldehyde
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Hannah Millington, MSNBC Newsweek, 14 Nov. 2025
On safety and environment, Li said the company’s fermentation and formulations avoid aniline, formaldehyde, and heavy metals.
—Angela Velasquez, Sourcing Journal, 11 Nov. 2025
Clean fashion follows in the footsteps of clean beauty, which had a significant rise in the early 2010s when brands such as Beautycounter began formulating products free from chemicals like parabens and formaldehyde — widely linked to health issues spanning from hormone disruption to cancer.
—Sophie Benson, Vogue, 30 Oct. 2025
It was formulated free of typical eye irritants, including parabens, formaldehydes, phthalates, mineral oil, and contained less than one percent synthetic fragrance.
—Essence, 28 Oct. 2025
See All Example Sentences for formaldehyde
Cite this Entry
“Formaldehyde.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/formaldehyde. Accessed 2 Dec. 2025.
Copy CitationKids Definition
formaldehyde
noun
form·al·de·hyde
fȯr-ˈmal-də-ˌhīd
fər-
: a colorless gas that consists of carbon, hydrogen, and oxygen, has a sharp irritating odor, and when dissolved in water is used to disinfect or to prevent decay
Medical Definition
formaldehyde
noun
form·al·de·hyde
fȯr-ˈmal-də-ˌhīd, fər-
: a colorless pungent irritating gas CH2O used chiefly as a disinfectant and preservative and in chemical synthesis
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