Any process that activates or increases the frequency, rate or extent of platelet aggregation. Platelet aggregation is the adhesion of one platelet to one or more other platelets via adhesion molecules.
Synonyms:
exact_synonym:
positive regulation of blood platelet aggregation; up regulation of blood platelet aggregation; up regulation of platelet aggregation; upregulation of blood platelet aggregation; upregulation of platelet aggregation
narrow_synonym:
activation of blood platelet aggregation; activation of platelet aggregation
related_synonym:
activation of thrombocyte aggregation; positive regulation of thrombocyte aggregation; up-regulation of thrombocyte aggregation; upregulation of thrombocyte aggregation