pyroxanthinn.

Brit.

/ˌpʌɪrə(ʊ)ˈzanθ(ᵻ)n/, U.S.

/ˈˌpaɪroʊˈzænθ(ə)n/

Forms: 1800s– pyroxanthin, 1800s– pyroxanthine.

Origin: A borrowing from German. Etymon: German Pyroxanthin.

Etymology: < German Pyroxanthin (W. Gregory 1837, in Ann. der Pharm. 21 145) < pyro- pyro- comb. form + ancient Greek ξανθός yellow (see xantho- comb. form) + -in -in suffix¹. Compare xanthin n.

Chemistry. Now rare.

A yellow, crystalline, tricyclic compound obtained by reaction of a component of wood tar with alkali.Systematic name: 2,5-difurfurylidenecyclopentanone; C₁₅H₁₂O₃.

ΚΠ

1838 R. D. Thomson Brit. Ann. 331 Eblanin or pyroxanthin.

1848 Chem. Gaz. 15 Sept. 357 According to Gregory, pyroxanthine is originally contained in the crude pyroxylic spirit.

1866–8 H. Watts Dict. Chem. IV. 776 Pyroxanthin crystallises in long yellow needles.

1903 S. Rideal Disinfection & Preservation Food viii. 235 The smell [of Stockholm tar] is principally due to the constituents of creosote, notably to the crystalline body called pyroxanthin, which..is said to be one of the best preservatives.

1926 A. W. Schorger Chem. Cellulose & Wood xiii. 460 Pyroxanthine (difurfural-ketopentamethylene)..is produced by condensation of furfural with adipic ketone when the pyroligneous acid is treated with lime.

This entry has been updated (OED Third Edition, December 2007; most recently modified version published online March 2022).

单词	pyroxanthin
释义	pyroxanthinn. Brit. /ˌpʌɪrə(ʊ)ˈzanθ(ᵻ)n/, U.S. /ˈˌpaɪroʊˈzænθ(ə)n/ Forms: 1800s– pyroxanthin, 1800s– pyroxanthine. Origin: A borrowing from German. Etymon: German Pyroxanthin. Etymology: < German Pyroxanthin (W. Gregory 1837, in Ann. der Pharm. 21 145) < pyro- pyro- comb. form + ancient Greek ξανθός yellow (see xantho- comb. form) + -in -in suffix¹. Compare xanthin n. Chemistry. Now rare. A yellow, crystalline, tricyclic compound obtained by reaction of a component of wood tar with alkali.Systematic name: 2,5-difurfurylidenecyclopentanone; C₁₅H₁₂O₃. ΚΠ 1838 R. D. Thomson Brit. Ann. 331 Eblanin or pyroxanthin. 1848 Chem. Gaz. 15 Sept. 357 According to Gregory, pyroxanthine is originally contained in the crude pyroxylic spirit. 1866–8 H. Watts Dict. Chem. IV. 776 Pyroxanthin crystallises in long yellow needles. 1903 S. Rideal Disinfection & Preservation Food viii. 235 The smell [of Stockholm tar] is principally due to the constituents of creosote, notably to the crystalline body called pyroxanthin, which..is said to be one of the best preservatives. 1926 A. W. Schorger Chem. Cellulose & Wood xiii. 460 Pyroxanthine (difurfural-ketopentamethylene)..is produced by condensation of furfural with adipic ketone when the pyroligneous acid is treated with lime. This entry has been updated (OED Third Edition, December 2007; most recently modified version published online March 2022). < n.1838
随便看	osteotomes osteotomies osteotomist osteotomists osteotomy osteozoa osteozoan osteozoaria osteria osterizer osteyour osthectic osthexy ostia ostiak ostial ostiar ostiaries ostiarius ostiary ostiate ostinati ostinato ostinatos ostiolar