Formaldehyde
: A pungent gas, with the chemical formula HCHO, used as an antiseptic, disinfectant, and especially today as a fixative for histology (the study of tissues under the microscope). Formalin is a 37% aqueous (water) solution of formaldehyde.
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A pungent gas, HCHO; used as an antiseptic, disinfectant, and histologic fixative. SYN: formic aldehyde, methyl aldehyde. [form(ic) + aldehyde]
- active f. 1. a hydroxymethyl derivative of tetrahydrofolate or thiamin pyrophosphate; 2. N5,N10-methylenetetrahydrofolate.

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form·al·de·hyde fȯr-'mal-də-.hīd, fər- n a colorless pungent irritating gas CH2O used chiefly as a disinfectant and preservative and in chemical synthesis

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n.
the aldehyde derivative of formic acid, formerly used as a vapour to sterilize and disinfect rooms and such items as mattresses and blankets. The toxic vapour is produced by boiling formalin in an open container or using it in a sealed autoclave.

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for·mal·de·hyde (for-malґdə-hīd) a gas formerly used as a strong disinfectant; an aqueous solution called formaldehyde solution (see under solution) is used as a disinfectant and as a preservative and fixative for pathologic specimens. The gas is toxic if inhaled or absorbed through the skin and is carcinogenic. Called also methanal and formic aldehyde.

Medical dictionary. 2011.

Look at other dictionaries:

  • formaldéhyde — [ fɔrmaldeid ] n. m. • 1893; de form(ique) et aldéhyde ♦ Chim. Aldéhyde formique, gaz incolore et irritant (HCHO), utilisé en solution comme désinfectant (⇒ formol) et dans la synthèse organique. ● formaldéhyde nom masculin Aldéhyde CH2≅O. ●… …   Encyclopédie Universelle

  • Formaldehyde — For*mal de*hyde, n. [Formic + aldehyde.] (Chem.) A colorless, volatile liquid, {H2CO}, resembling acetic or ethyl aldehyde, and chemically intermediate between methyl alcohol and formic acid. [1913 Webster] …   The Collaborative International Dictionary of English

  • formaldehyde — formaldehyde. См. формальдегид. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • formaldehyde — pungent gas formed by oxidation of methyl alcohol, 1869, a contraction of formic aldehyde; see FORMIC (Cf. formic) + ALDEHYDE (Cf. aldehyde). Discovered in 1863 by German chemist August Wilhelm von Hofmann (1818 1892) …   Etymology dictionary

  • formaldehyde — ► NOUN Chemistry ▪ a colourless pungent gas derived from methanol, used in solution as a preservative for biological specimens. ORIGIN blend of FORMIC ACID(Cf. ↑formic acid) and ALDEHYDE(Cf. ↑aldehyde) …   English terms dictionary

  • formaldehyde — [fôr mal′də hīd΄, fərmal′də hīd΄] n. [ FORM(IC) + ALDEHYDE] a pungent gas, HCHO, used in solution as a strong disinfectant and preservative, and in the manufacture of synthetic resins, dyes, etc …   English World dictionary

  • Formaldehyde — For other uses, see Formaldehyde (disambiguation). Formaldehyde …   Wikipedia

  • Formaldehyde — Méthanal Méthanal Représentation du méthanal …   Wikipédia en Français

  • Formaldéhyde — Méthanal Méthanal Représentation du méthanal …   Wikipédia en Français

  • formaldehyde — /fawr mal deuh huyd , feuhr /, n. Chem. a colorless, toxic, potentially carcinogenic, water soluble gas, CH2O, having a suffocating odor, usually derived from methyl alcohol by oxidation: used chiefly in aqueous solution, as a disinfectant and… …   Universalium

  • formaldehyde — 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. [1913… …   The Collaborative International Dictionary of English

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