英日字典: Ca
    The ca has 2 Senses.
-  calcium, ca, atomic number 20
-  Ca, Ca, カルシウム
- a white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most plants and animals
- 明るい炎を上げて燃焼する白色の金属元素