# polycythemia

> English word · Noun · IPA /ˌpɒlɪsaɪˈθiːmɪə/

## Definitions
1. A rare disorder in which the bone marrow produces an abnormally large amount of blood cells, often red blood cells.

## Etymology
From poly- + -cyte + -emia, with /θ/ for euphony; akin to poly- + -cyte + hem- + -ia; morphologically parallel with erythrocythemia.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/polycythemia