| 单词 | tetrad |
| 释义 | Word Frequency tetrad(ˈtɛtræd) noun 1. a group or series of four 2. the number four 3. botany a group of four cells formed by meiosis from one diploid cell 4. genetics a four-stranded structure, formed during the pachytene stage of meiosis, consisting of paired homologous chromosomes that have each divided into two chromatids 5. chemistry an element, atom, group, or ion with a valency of four 6. ecology a square of 2 × 2 km used in distribution mapping Word origin C17: from Greek tetras, from tettares four |
| 随便看 |
英语词典包含233703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。