1. potassium ferrocyanide

noun. A cyanide compound that is prepared by the reaction of potassium cyanide with ferrous salts; commonly used by gardeners.
Synonyms
yellow prussiate of potash ferrocyanide

2. potassium-argon dating

noun. Geological dating that relies on the proportions of radioactive potassium in a rock sample and its decay product, argon.
Synonyms
geological dating dating

3. ferrocyanide

noun. Salt of ferrocyanic acid usually obtained by a reaction of a cyanide with iron sulphate.
Synonyms
salt potassium ferrocyanide yellow prussiate of potash
Antonyms
dull

4. potassium

noun. (pəˈtæsiːəm) A light soft silver-white metallic element of the alkali metal group; oxidizes rapidly in air and reacts violently with water; is abundant in nature in combined forms occurring in sea water and in carnallite and kainite and sylvite.
Synonyms
saltwater carnallite metal sylvine seawater kainite langbeinite brine sylvite metallic element atomic number 19 K
Antonyms
fresh water nonmetallic
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