| NOUN | substance | caustic soda, sodium hydroxide | a strongly alkaline caustic used in manufacturing soap and paper and aluminum and various sodium compounds |
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| Meaning | A strongly alkaline caustic used in manufacturing soap and paper and aluminum and various sodium compounds. | |
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| Synonym | sodium hydroxide | |
| Broader | hydroxide, hydrated oxide | A compound of an oxide with water |
| lye | A strong solution of sodium or potassium hydroxide | |
| Spanish | hidróxido de sodio, sosa cáustica | |
| Catalan | hidròxid de sodi, sosa càustica | |
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