atom基本信息
读法：英 ["ætəm] 美 ["ætəm]
释义：
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英英释义
Noun:
中英词源
atom 原子
前缀a-, 不，非。词根tom, 切，见anatomy. 因古代哲学观念认为原子是最小的不可切分单位而得名。
- atom
- atom: [16] Etymologically, atom means ‘not cut, indivisible’. Greek átomos ‘that which cannot be divided up any further’ was formed from the negative prefix a- ‘not’ and the base *tom- ‘cut’ (source also of English anatomy and tome), and was applied in the Middle Ages not just to the smallest imaginable particle of matter, but also to the smallest imaginable division of time; an hour contained 22,560 atoms.
Its use by classical writers on physics and philosophy, such as Democritus and Epicurus, was sustained by medieval philosophers, and the word was ready and waiting for 19th-century chemists when they came to describe and name the smallest unit of an element, composed of a nucleus surrounded by electrons.
=> anatomy, tome - atom (n.)
- late 15c., as a hypothetical indivisible body, the building block of the universe, from Latin atomus (especially in Lucretius) "indivisible particle," from Greek atomos "uncut, unhewn; indivisible," from a- "not" + tomos "a cutting," from temnein "to cut" (see tome). An ancient term of philosophical speculation (in Leucippus, Democritus), revived 1805 by British chemist John Dalton. In late classical and medieval use also a unit of time, 22,560 to the hour. Atom bomb is from 1945 as both a noun and a verb; compare atomic.
词态变化
复数 atoms;
权威造句
- 1. He patented the idea that the atom could be split.
- 他获得了“原子可以再分”这一概念的专利权。
来自柯林斯例句
- 2. the splitting of the atom
- 原子的分裂
来自《权威词典》
- 3. A molecule of water consists of two atoms of hydrogen and one atom of oxygen.
- 水分子由两个氢原子和一个氧原子构成。
来自《权威词典》
- 4. The neutrons and protons form the core of the atom.
- 中子和质子构成了原子核.
来自《简明英汉词典》
- 5. For many years the atom was believed to be indivisible.
- 在过去有很多年原子一直被认为是不可分割的.
来自《简明英汉词典》
近反义词
相似短语
单词分析
这些名词均有“粒，微粒”之意。molecule指物质中保持原物质的一切化学性质，能独立存在的最小微粒，即分子。
atom指元素的最小粒子，其体积比molecule小。
particle指任何物质的微粒，引申指任何小的部分。
speck一般指“微点”或“微粒”，可引申指“斑点、污点”。
grain通常指能为肉眼清楚看到的颗粒，比上述几个词所表“粒”的体积大。
记忆方法
1、a- "not" + tom-.
2、字面含义：uncut, indivisible. => indivisible particle.
3、最初，人们认为原子就是宇宙中不可分割的最小微粒，因此就给它取名为“atom”了，当然后来证明这种认为是错误的。
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