Entry 1 sense Webster, 1913 Paraglobulin /(păr`ȧ*glŏb"ū̇*lĭn)/ · Par·a·glob·u·lin · IPA 01 n. A protein in blood serum, belonging to the group of globulins. See Fibrinoplastin. 1. A protein in blood serum, belonging to the group of globulins. See Fibrinoplastin.(Physiol. Chem.) See: Fibrinoplastin