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al·um
 alum
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- pronunciation:
- ae
l
 m
- features:
- Word Combinations (noun)
| part of speech: |
noun |
| definition 1: |
an astringent chemical solid used as a styptic and in tanning and dyeing.
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| definition 2: |
any one of various double sulfates of a trivalent metal and a univalent metal.
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