IPA: /ˌpɒlɪˈsaɪθɛmɪk/
KK: /pɑːlɪˈsaɪθɛmɪk/
Relating to a condition where there is an increased number of red blood cells in the blood.
The doctor diagnosed him as polycythemic after reviewing his blood test results.
Polycythemic → It is formed from "poly-" (from Greek "polus", meaning many) and "cythemic" (from Greek "kytos", meaning cell, and "haima", meaning blood). The word describes a condition characterized by an increase in the number of blood cells, particularly red blood cells, in the bloodstream.
Think of 'many' ('poly-') cells ('cythemic') in the blood — that's what polycythemic means.