1704, "kernel of a nut," 1708, "head of a comet," from Latin nucleus "kernel," from nucula "little nut," diminutive of nux (genitive nucis) "nut," from PIE *kneu- "nut" (cognates: Middle Irish cnu, Welsh cneuen, Middle Breton knoen "nut," Old Norse hnot, Old English hnutu "nut"). General sense of "central part or thing, about which others cluster" is from 1762. Use in reference to cells first recorded 1831. Modern atomic meaning is 1912, first by Ernest Rutherford, though theoretical use for "central point of an atom" is from 1844, in Faraday.
例文
1. The repulsive force within the nucleus is enormous.
核子内部の反発力は巨大である。
2.the nucleus of a cell
細胞核
3.These paintings will form the nucleus of a new collection.
これらの絵は新しいコレクションシリーズの基礎を構成します。
＜dl>＜dt＞4.These young people formed the nucleus of the club.
これらの若者たちはクラブの中核となっている。
5.The nucleus of an atom consists of neutrons，protons and other particles.