etymologeek.com dictionary
English word cal comes from English calcium, English hydroxide.

Cal etymology history

Cal detailed word origin explanation

Dictionary entryLanguageDefinition
calcium English (eng) (countable) An atom of this element.. 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.
hydroxide English (eng) (chemistry) An univalent anion (OH-) based on the hydroxyl functional group.. Any substance containing such an anion.
calcium hydroxide English (eng) (inorganic compound) A soft, white powder, Ca(OH)2, obtained by the action of water on calcium oxide; slaked lime.
cal English (eng) Calcium hydroxide, slaked lime.