Polycythemia

Part of speech: noun

Pronunciation: /ˌpɒlɪsaɪˈθiːmɪə/

Definitions

1. A blood disorder marked by an elevated count of erythrocytes, leading to increased blood viscosity and potentially serious health issues
2. This condition features an enhanced red blood cell volume in circulation, which may pose risks such as thrombosis and cardiovascular complications
3. A medical condition characterized by an unusually high concentration of red blood cells in the bloodstream, resulting in thickened blood and increased risk of serious health conditions

Etymology: Polycythemia is a compound built from three Greek-derived parts. "Poly" means "many," "cyte" comes from "kytos," a hollow vessel or cell, and "-emia" comes from "haima," meaning blood, so the word literally describes too many cells in the blood. The final syllable is a little unusual: the "-emia" ending is spelled to match the Greek, but the "th" in the middle of the pronunciation was added for ease of speaking, a process linguists call euphony. The word is closely related to "erythrocythemia," which follows the same pattern but uses "erythros," Greek for red, to specify that the excess cells are red blood cells. Polycythemia is the broader term, and its shape reflects the same coinage habits that produced many medical terms built from classical roots.