| 单词 | nucleus |
| 释义 | nucleus n. (pl. nuclei) 1. a the central part or thing round which others are collected. b the kernel of an aggregate or mass. 2. an initial part meant to receive additions. 3. Astron. the solid part of a comet's head. 4. Physics the positively charged central core of an atom that contains most of its mass. 5. Biol. a large dense organelle of eukaryotic cells, containing the genetic material. 6. a discrete mass of grey matter in the central nervous system. Etymology: L, = kernel, inner part, dimin. of nux nucis nut |
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