| 单词 | pyrone |
| 释义 | pyrone[ pahy-rohn, pahy-rohn ] / ˈpaɪ roʊn, paɪˈroʊn / noun Chemistry.either of two heterocyclic ketones having the formula C5H4O2. Origin of pyroneFirst recorded in 1890–95; pyr- + -one Words nearby pyronepyrometer, pyrometric bead, pyrometric cone, pyromorphite, pyromucic aldehyde, pyrone, pyronine, pyrope, pyrophobia, pyrophoric, pyrophosphatase Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for pyronepyrone / (ˈpaɪrəʊn, paɪˈrəʊn) / nouneither of two heterocyclic compounds that have a ring containing five carbon atoms and one oxygen atom with two double bonds and a second oxygen atom attached to a carbon atom in either the ortho -position (alpha pyrone) or the para -position (gamma pyrone) any one of a class of compounds that are substituted derivatives of a pyrone Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 |
| 随便看 |
|
英语词典包含192737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。