† paramn.

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

Etymology: < German Param (F. Beilstein & A. Geuther 1858, in Ann. der Chem. u. Pharm. 108 100), shortened < Paracyanamid ( < para- para- prefix¹ + Cyanamid cyanamide n.). N.E.D. (1904) gives the pronunciation as (pæ·ræm) /ˈpæræm/.

Chemistry. Obsolete.

A white crystalline compound formed by the dimerization of cyanamide; dicyandiamide or cyanoguanidine, HN=C(NH₂)NHC≡N.

ΘΚΠ

the world > matter > chemistry > organic chemistry > amides > [noun] > others

tartaric amide1789

cyanamide1838

sodamide1838

furfuramide1845

opiammone1845

formamide1852

param1866

tartranil1868

terephthalamide1868

sulphonamide1881

acrylamide1893

caprolactam1944

lysergic acid1952

thioTEPA1953

lipoamide1960

1866 F. Beilstein & A. Geuther in H. Watts Dict. Chem. IV. 350 Cyanamide changes into param when left to itself for a long time.

1877 H. Watts Fownes's Man. Chem. (ed. 12) II. 106 Dicyanodiamide, C₂N₄H₄ (Param).

This entry has been updated (OED Third Edition, June 2005; most recently modified version published online December 2019).

单词	param
释义	† paramn. Origin: A borrowing from German. Etymon: German Param. Etymology: < German Param (F. Beilstein & A. Geuther 1858, in Ann. der Chem. u. Pharm. 108 100), shortened < Paracyanamid ( < para- para- prefix¹ + Cyanamid cyanamide n.). N.E.D. (1904) gives the pronunciation as (pæ·ræm) /ˈpæræm/. Chemistry. Obsolete. A white crystalline compound formed by the dimerization of cyanamide; dicyandiamide or cyanoguanidine, HN=C(NH₂)NHC≡N. ΘΚΠ the world > matter > chemistry > organic chemistry > amides > [noun] > others tartaric amide1789 cyanamide1838 sodamide1838 furfuramide1845 opiammone1845 formamide1852 param1866 tartranil1868 terephthalamide1868 sulphonamide1881 acrylamide1893 caprolactam1944 lysergic acid1952 thioTEPA1953 lipoamide1960 1866 F. Beilstein & A. Geuther in H. Watts Dict. Chem. IV. 350 Cyanamide changes into param when left to itself for a long time. 1877 H. Watts Fownes's Man. Chem. (ed. 12) II. 106 Dicyanodiamide, C₂N₄H₄ (Param). This entry has been updated (OED Third Edition, June 2005; most recently modified version published online December 2019). < n.1866
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