| 单词 | atom |
| 释义 | atom /at"euhm/, n. 1. Physics. a. the smallest component of an element having the chemical properties of the element, consisting of a nucleus containing combinations of neutrons and protons and one or more electrons bound to the nucleus by electrical attraction; the number of protons determines the identity of the element. b. an atom with one of the electrons replaced by some other particle: muonic atom; kaonic atom. 2. Energy. this component as the source of nuclear energy. 3. a hypothetical particle of matter so minute as to admit of no division. 4. anything extremely small; a minute quantity. [1350-1400; ME attomos, athomus < L atomus < Gk átomos, n. use of átomos undivided, equiv. to a- A-6 + tomós divided, verbid of témnein to cut] Syn. 4. shred, speck, scintilla, iota, jot, whit. |
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