Term: thymus primordium leukocyte
Name: thymus primordium
Synonyms: thymic rudiment
Definition: A small outgrowth of the pharyngeal epithelium that is the site of lymphocyte cell production.
Ontology: Anatomy Ontology [ZFA:0001077]

Name: leukocyte
Synonyms: immune cell, leucocyte, white blood cell
Definition: An achromatic cell of the myeloid or lymphoid lineages, found in blood or other tissue.
Ontology: Anatomy Ontology [ZFA:0009309]