chronic myelocytic leukemia chro·nic·mye·locyticleukemia uncommon noun 1. chronic leukemia characterized by granular leukocytes; more common in older people Synonymschronic myelocytic leukemiamyeloid leukemia Related words Broader terms myelocytic leukemiachronic leukemia WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.