| 单词 | pyran ring |
| 释义 | > as lemmaspyran ring pyran ring n. a ring of five carbon atoms and one oxygen atom.Used to denote both saturated and unsaturated rings of this type. ΘΚΠ the world > matter > chemistry > organic chemistry > hydrocarbons > [noun] > cyclic hydrocarbons > pyran ring pyran ring1904 1904*Pyran ring [see main sense]. 1952 K. Venkataraman Chem. Synthetic Dyes II. xxiv. 742 The γ-pyran ring..occurs in the anthocyanins, the red, violet and blue coloring matters of flowers and fruits. 1983 F. J. McQuillin & M. S. Baird Alicyclic Chem. (ed. 2) ii. 47 The pyran ring is structurally analogous with cyclohexane, and pyran adopts the chair conformation. < as lemmas |
| 随便看 |
英语词典包含1132095条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。