potassic adjective. [pǝ'tasɪk] M19.
[from POTASSIUM + -IC.]
1. Chemistry. Of, pertaining to, or containing potassium or potash. Now rare. M19.

2. Geology. Of a mineral or rock: containing an appreciable or a greater than average quantity of potassium, often as compared with sodium. Also, designating a metamorphic process in which such minerals are formed. E20.

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