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A New Latin word derived by Sir Humphry Davy in 1808, from [[w:Template:lang:la language|Template:lang:la]][[Category:Template:lang:la derivations]] calx ("lime", "limestone") because it occurs in limestone.
- A chemical element, atomic number 20, that is an alkaline earth metal and occurs naturally as carbonate in limestone and as silicate in many rocks.
- ^ Chambers Dictionary of Etymology, Robert K. Barnhart (ed.), Chambers, 1988
For etymology and more information refer to: http://elements.vanderkrogt.net/elem/ca.html (A lot of the translations were taken from that site with permission from the author)
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