factor iv

Noun
  1. Ion of calcium;
    A factor in the clotting of blood (synset 115095796)
    is a type of:
    • atomic number 20, ca, calcium - 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
    • clotting factor, coagulation factor - any of the factors in the blood whose actions are essential for blood coagulation
    same as: calcium ion

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