
These are a group of white blood cells that have many and well-pigmented granules, and derive from the bone marrow myeloblasts. The granules are sources of digestive, immunologic, and inflammatory proteins.
Found on
http://www.swsbm.com/ManualsMM/MedHerbGloss2.txt

White blood cells that contain stainable granules; examples include neutrophils, eosinophils, and basophils.
Found on
http://www.thehorse.com/Glossary.xhtml?L=G

A white blood cell type of the immune system filled with granules of toxic chemicals that enable them to digest microorganisms. Basophils, neutrophils, eosinophils, and PMNs are examples of granulocytes.
Found on
http://www.virology.net/ATVGlossary.html

leukocytes found in the peripheral blood that are characterized by numerous granules in the cytoplasm; granulocytes include neutrophils, eosinophils, and basophils
Found on
https://courses.lumenlearning.com/microbiology/chapter/glossary/

a type of white blood cell that helps the body fight infection. The types of granulocytes include: basophils, eosinophils, and neutrophils.
Found on
https://www.stanfordchildrens.org/en/topic/default?id=glossary---hematology
No exact match found.