blood corpuscle blood·cor·puscle uncommon noun 1. either of two types of cells (erythrocytes and leukocytes) and sometimes including platelets Synonymsblood cellblood corpusclecorpuscle Related words Broader terms somatic cell Narrower terms leukocytepacked cellsred blood cell Parts blood WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.