Usually means: Calcium ion, symbolized as Ca²⁺.
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We found 3 dictionaries that define the word ca2:

General (2 matching dictionaries)
  1. Ca(H2PO4)2: Dictionary.com
  2. CA(OH)2, CA2, Ca(OH)2: Wikipedia, the Free Encyclopedia

Miscellaneous (1 matching dictionary)
  1. CA2: Acronym Finder






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