| 单词 | nucleus |
| 释义 | Word Frequency nucleus(ˈnjuːklɪəs) nounWord forms: plural -clei (-klɪˌaɪ) or rare -cleuses 1. a central or fundamental part or thing around which others are grouped; core 2. a centre of growth or development; basis; kernel the nucleus of an idea 3. biology (in the cells of eukaryotes) a large compartment, bounded by a double membrane, that contains the chromosomes and associated molecules and controls the characteristics and growth of the cell 4. anatomy any of various groups of nerve cells in the central nervous system 5. astronomy the central portion in the head of a comet, consisting of small solid particles of ice and frozen gases, which vaporize on approaching the sun to form the coma and tail 6. physics the positively charged dense region at the centre of an atom, composed of protons and neutrons, about which electrons orbit 7. chemistry a fundamental group of atoms in a molecule serving as the base structure for related compounds and remaining unchanged during most chemical reactions the benzene nucleus 8. botany a. the central point of a starch granule b. a rare name for nucellus 9. phonetics the most sonorous part of a syllable, usually consisting of a vowel or frictionless continuant 10. logic the largest individual that is a mereological part of every member of a given class Word origin C18: from Latin: kernel, from nux nut |
| 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。