hydroxide

/haɪˈdrɑkˌsaɪd/
noun
  1. A chemical compound that contains one or more hydroxide ions (OH⁻), often a base or alkali.
    • The lab technician carefully measured the amount of hydroxide needed for the reaction.
    • Sodium hydroxide is a strong base used in making soap and cleaning products.
    • Many household drain cleaners contain potassium hydroxide to dissolve grease.
Antonyms
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