Physics. In form e. Denoting (with superscript ‘−’ in later use) an electron. In later use also (with superscript ‘+’) denoting a positron.
| 单词 | θ79104 |
| 释义 | the world > matter > physics > atomic physics > particle physics > particle avoiding strong interaction > electron > [noun] > positive electron (6) E1894 Physics. In form e. Denoting (with superscript ‘−’ in later use) an electron. In later use also (with superscript ‘+’) denoting a positron. positive electron1899 a subatomic particle analogous to an electron but having a positive charge (now identified with a positron). positron1933 An elementary particle having the same mass as an electron and a numerically equal but positive charge. positon1937 = positron, n. Now rare. Subcategories:— position of absent electron (1) — neutral system (1) |
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