ethenoidadj.

Brit.

/ˈɛθᵻnɔɪd/, U.S.

/ˈɛθəˌnɔɪd/

Origin: Formed within English, by derivation. Etymons: ethene n., -oid suffix.

Etymology: < ethene n. + -oid suffix.

Chemistry. Now rare.

Resembling ethene in structure or properties; characteristic of ethene; ethylenic.

ΘΚΠ

the world > matter > chemistry > organic chemistry > hydrocarbons > [adjective] > alkenes

ethylic1840

ethenoid1893

olefinic1898

1893 H. E. Armstrong in Chem. News 30 Mar. 154/1 Seemingly also, ethenoid carbon—carbon as it is in ethylene, whatever may be the mode in which the atoms are united—has a constant [optical] value.

1932 Canad. Jrnl. Res. 7 475 The bromine absorption of the polymers is very small but..measurable. This fact might be taken to prove the existence of an open-chain structure with an ethenoid linkage.

1954 E. W. Eckey Veg. Fats & Oils xvi. 543 No evidence could be obtained for the existence of glycerides having less than 4 ethenoid groups.

This entry has been updated (OED Third Edition, March 2014; most recently modified version published online March 2022).

单词	ethenoid
释义	ethenoidadj. Brit. /ˈɛθᵻnɔɪd/, U.S. /ˈɛθəˌnɔɪd/ Origin: Formed within English, by derivation. Etymons: ethene n., -oid suffix. Etymology: < ethene n. + -oid suffix. Chemistry. Now rare. Resembling ethene in structure or properties; characteristic of ethene; ethylenic. ΘΚΠ the world > matter > chemistry > organic chemistry > hydrocarbons > [adjective] > alkenes ethylic1840 ethenoid1893 olefinic1898 1893 H. E. Armstrong in Chem. News 30 Mar. 154/1 Seemingly also, ethenoid carbon—carbon as it is in ethylene, whatever may be the mode in which the atoms are united—has a constant [optical] value. 1932 Canad. Jrnl. Res. 7 475 The bromine absorption of the polymers is very small but..measurable. This fact might be taken to prove the existence of an open-chain structure with an ethenoid linkage. 1954 E. W. Eckey Veg. Fats & Oils xvi. 543 No evidence could be obtained for the existence of glycerides having less than 4 ethenoid groups. This entry has been updated (OED Third Edition, March 2014; most recently modified version published online March 2022). < adj.1893
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