diacetyln.

Origin: Formed within English, by compounding; modelled on a German lexical item. Etymons: di- comb. form, acetyl n.

Etymology: < di- comb. form + acetyl n., after German Diacetyl (1868 or earlier).Previous versions of the OED give the stress as: diˈacetyl.

Chemistry.

See di- comb. form 2, and acetyl n.

ΚΠ

1872 H. Watts Dict. Chem. VI. 30 [He] has obtained a colourless pungent liquid, which is probably free acetyl or diacetyl (C₂H₃O)₂.

1883 New Sydenham Soc. Lexicon Diacetyl carbamide CO(NH.C₂H₃O)₂, a product of the action of carbonyl-chloride on urea at 50°C.; it crystallises from hot alcohol in rhombic needles.

This entry has not yet been fully updated (first published 1895; most recently modified version published online December 2020).

单词	diacetyl
释义	diacetyln. Origin: Formed within English, by compounding; modelled on a German lexical item. Etymons: di- comb. form, acetyl n. Etymology: < di- comb. form + acetyl n., after German Diacetyl (1868 or earlier).Previous versions of the OED give the stress as: diˈacetyl. Chemistry. See di- comb. form 2, and acetyl n. ΚΠ 1872 H. Watts Dict. Chem. VI. 30 [He] has obtained a colourless pungent liquid, which is probably free acetyl or diacetyl (C₂H₃O)₂. 1883 New Sydenham Soc. Lexicon Diacetyl carbamide CO(NH.C₂H₃O)₂, a product of the action of carbonyl-chloride on urea at 50°C.; it crystallises from hot alcohol in rhombic needles. This entry has not yet been fully updated (first published 1895; most recently modified version published online December 2020). < n.1872
随便看	tomato sauce tomato scab tomato seedling tomato skin tomato soup tomato sphinx tomato sphinx moth tomato variety tomato vine tomato water tomato worm tomato yellows tomato-based tomato-coloured tomato-faced tomato-hued tomato-nosed tomatobased tomatocoloured tomatoes tomatoey tomatofaced tomatohued tomatonosed tomax