nucleus (n.)
IPA: PHONETIC RESPELLING:
1704年，“果仁”;1708年，“彗星的头部”。源自拉丁语nucleus“核”源自nucula“小坚果”nux的小称(属格的nucis)“坚果”，源自PIE *kneu-“坚果”(也是中古爱尔兰语cnu，威尔士语cneuen，中古布雷顿语knoen“坚果”，古斯堪的纳维亚语hnot，古英语hnutu“坚果”的来源)。
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" (source also of Middle Irish cnu, Welsh cneuen, Middle Breton knoen "nut," Old Norse hnot, Old English hnutu "nut").