seco-comb. form

Stress is determined by a range of factors though some degree of stress is usually maintained on this combining form, e.g. seco-steroid Brit.

/ˌsɛkə(ʊ)ˈstɛrɔɪd/,

/ˌsɛkə(ʊ)ˈstɪərɔɪd/, U.S.

/ˌsɛkoʊˈstɛˌrɔɪd/,

/ˌsɛkoʊˈstɪˌrɔɪd/.

Etymology: < Latin secāre to cut + -o suffix.

Chemistry.

A formative element used in naming derivatives, esp. of steroids, in which fission of a ring has occurred (see quot. 1951). Hence also as quasi-adj.

ΚΠ

1951 R. S. Cahn et al. in Jrnl. Chem. Soc. 3535 Ring fission, with addition of a hydrogen atom at each terminal group thus created, shall be indicated by the prefix seco, the original steroid numbering being retained.

1959 L. F. Fieser & M. Fieser Steroids iv. 156 This was identified as the 2,3-secodicarboxylic acid..by saponification, oxidation to the 7-ketone, and Wolff-Kishner reduction to the known 2,3-secocholestane-2,3-dicarboxylic acid.

1961 I. E. Bush Chromatogr. Steroids ii. 102 The opening of rings to form seco-dicarboxylic acids.

1961 I. E. Bush Chromatogr. Steroids vi. 342 The C₁₉ triols..are oxidized to the d- seco-16,17-dialdehydes.

1977 Lancet 16 Apr. 841/1 The physiological regulation of secretion of this seco-steroid by the kidney.

This entry has not yet been fully updated (first published 1986; most recently modified version published online March 2022).

单词	seco-
释义	seco-comb. form Stress is determined by a range of factors though some degree of stress is usually maintained on this combining form, e.g. seco-steroid Brit. /ˌsɛkə(ʊ)ˈstɛrɔɪd/, /ˌsɛkə(ʊ)ˈstɪərɔɪd/, U.S. /ˌsɛkoʊˈstɛˌrɔɪd/, /ˌsɛkoʊˈstɪˌrɔɪd/. Etymology: < Latin secāre to cut + -o suffix. Chemistry. A formative element used in naming derivatives, esp. of steroids, in which fission of a ring has occurred (see quot. 1951). Hence also as quasi-adj. ΚΠ 1951 R. S. Cahn et al. in Jrnl. Chem. Soc. 3535 Ring fission, with addition of a hydrogen atom at each terminal group thus created, shall be indicated by the prefix seco, the original steroid numbering being retained. 1959 L. F. Fieser & M. Fieser Steroids iv. 156 This was identified as the 2,3-secodicarboxylic acid..by saponification, oxidation to the 7-ketone, and Wolff-Kishner reduction to the known 2,3-secocholestane-2,3-dicarboxylic acid. 1961 I. E. Bush Chromatogr. Steroids ii. 102 The opening of rings to form seco-dicarboxylic acids. 1961 I. E. Bush Chromatogr. Steroids vi. 342 The C₁₉ triols..are oxidized to the d- seco-16,17-dialdehydes. 1977 Lancet 16 Apr. 841/1 The physiological regulation of secretion of this seco-steroid by the kidney. This entry has not yet been fully updated (first published 1986; most recently modified version published online March 2022). < comb. form1951
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