| 单词 | subgroup |
| 释义 | subgroup /sub"groohp'/, n. 1. a subordinate group; a division of a group. 2. Chem. a division of a group in the periodic table. 3. Math. a subset of a group that is closed under the group operation and in which every element has an inverse in the subset. [1835-45; SUB- + GROUP] |
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