Caustic
121caustic potash — n. potassium hydroxide, toxic and very corrosive white chemical (used in the soap and bleach industry) …
122caustic potash — noun potassium hydroxide …
123caustic soda — noun sodium hydroxide …
124caustic soda — noun (U) a very strong chemical substance that you can use for some difficult cleaning jobs …
125caustic soda — see sodium hydroxide …
126caustic potash — caus′tic pot′ash n. chem. potassium hydroxide • Etymology: 1865–70 …
127caustic soda — caus′tic so′da n. chem. sodium hydroxide • Etymology: 1875–80 …
128caustic potash — /kɒstɪk ˈpɒtæʃ/ (say kostik potash) noun potassium hydroxide, KOH …