英语词汇form-的发音释义、词根词缀、结构分析、同源词、词频及词根记忆法-英语词根词缀词典

form-
combining form
or formo-

ETYMOLOGY formic

: formic acid
formate

form-|fɔːm|in Chem., combining form of formic or formyl, as in formal |ˈfɔəmæl| n.², any of the acetals derived from formaldehyde, having the general formula CH₂(OR)₂; spec. methylal, CH₂(OCH₃)₂; ˈformamide, the amide of formic acid; forˈmamidine, the postulated compound NH₂·CH:NH, which is known only as its salts; forˈmanilide, a white crystalline compound, C₆H₅·NH·COH, used as an antipyretic, analgesic, and local anæsthetic. (Cf. the termination of chloro-form.)1900Dorland Med. Dict., Formal, methylol or methylene dimethylate..: a clear, fragrant liquid. It is anesthetic and hypnotic.1952E. H. Rodd Chem. Carbon Compounds I. xvi. 1031 A mixture of the isomeric formals is obtained from glycerol, trioxymethylene and conc. HCl at 100°.1852Formamide [see formanilide].1863A. W. Hofmann in Jrnl. Chem. Soc. XVI. 72 Half-way between formate of ammonium and hydrocyanic acid, theory justifies us in searching for formamide.Ibid. 73 This substance, which is equally soluble in water, alcohol and ether is formamide.1869Roscoe Chem. 349 Formamide, obtained by acting on ethyl formate with ammonia.1890Lancet 11 Oct. 783/2 Injections..of a 1 per cent. solution of formamide of mercury.1882Jrnl. Chem. Soc. XLI. 266 The solid therefore obtained by the action of the substance, 2HCN + 3HCl, upon alcohol is the hydrochloride of the base.. formamidine.1952Jrnl. Appl. Chem. II. 203 It is now possible to report a simple method for the synthesis of formamidine hydrochloride.1852W. Gregory Handbk. Org. Chem. 337 Formanilide, the analogous compound to which, formamide, is not known.1966Millar & Springall Sidgwick's Org. Chem. Nitrogen (ed. 3) vii. 224 The formylation of aromatic amines proceeds very readily; formanilide, H·CONHPh, is rapidly formed on boiling dilute formic acid with aniline.

form-
combining form
or formo-
Etymology: formic (acid)
: formic acid : formyl
< formanilide >
< formotoluidide >

词汇	form-
词根词缀	MWCD OED Webster form- combining form or formo- ETYMOLOGY formic : formic acid formate form-\|fɔːm\|in Chem., combining form of formic or formyl, as in formal \|ˈfɔəmæl\| n.², any of the acetals derived from formaldehyde, having the general formula CH₂(OR)₂; spec. methylal, CH₂(OCH₃)₂; ˈformamide, the amide of formic acid; forˈmamidine, the postulated compound NH₂·CH:NH, which is known only as its salts; forˈmanilide, a white crystalline compound, C₆H₅·NH·COH, used as an antipyretic, analgesic, and local anæsthetic. (Cf. the termination of chloro-form.)1900Dorland Med. Dict., Formal, methylol or methylene dimethylate..: a clear, fragrant liquid. It is anesthetic and hypnotic.1952E. H. Rodd Chem. Carbon Compounds I. xvi. 1031 A mixture of the isomeric formals is obtained from glycerol, trioxymethylene and conc. HCl at 100°.1852Formamide [see formanilide].1863A. W. Hofmann in Jrnl. Chem. Soc. XVI. 72 Half-way between formate of ammonium and hydrocyanic acid, theory justifies us in searching for formamide.Ibid. 73 This substance, which is equally soluble in water, alcohol and ether is formamide.1869Roscoe Chem. 349 Formamide, obtained by acting on ethyl formate with ammonia.1890Lancet 11 Oct. 783/2 Injections..of a 1 per cent. solution of formamide of mercury.1882Jrnl. Chem. Soc. XLI. 266 The solid therefore obtained by the action of the substance, 2HCN + 3HCl, upon alcohol is the hydrochloride of the base.. formamidine.1952Jrnl. Appl. Chem. II. 203 It is now possible to report a simple method for the synthesis of formamidine hydrochloride.1852W. Gregory Handbk. Org. Chem. 337 Formanilide, the analogous compound to which, formamide, is not known.1966Millar & Springall Sidgwick's Org. Chem. Nitrogen (ed. 3) vii. 224 The formylation of aromatic amines proceeds very readily; formanilide, H·CONHPh, is rapidly formed on boiling dilute formic acid with aniline. form- combining form or formo- Etymology: formic (acid) : formic acid : formyl < formanilide > < formotoluidide >
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