Biology Prefixes and Suffixes: erythr- or erythro-

Erythrocytes (Red Blood Cells)
Erythrocytes (Red Blood Cells). Credit: CDC/Janice Haney Carr


The prefix (-erythr or -erythro) means red or reddish. It is derived from the Greek word eruthros meaning red.


Erythralgia (erythr-algia) - disorder of the skin characterized by pain and redness of affected tissues.

Erythremia (Erythr-emia) - abnormal increase in red blood cell numbers in the blood.

Erythrism (Erythr-ism) - condition characterized by redness of hair, fur or plummage.

Erythroblast (Erythro-blast) - immature nucleus-containing cell found in bone marrow that forms erythrocytes (red blood cells).

Erythroblastoma (Erythro-blast-oma) - tumor composed of cells that resemble red blood cell precursor cells known as megaloblasts.

Erythroblastopenia (Erythro-blasto-penia) - deficiency in the numbers of erythroblasts in bone marrow.

Erythrocyte (Erythro-cyte) - cell of the blood that contains hemoglobin and transports oxygen to cells. It is also known as a red blood cell.

Erythrocytolysis (Erythro-cyto-lysis) - red blood cell dissolution or destruction that allows the hemoglobin contained within the cell to escape into its surrounding environment.

Erythroderma (Erythro-derma) - condition characterized by abnormal redness of the skin that covers a widespread area of the body.

Erythrodontia (Erythro-dontia) - discoloration of the teeth that causes them to have a reddish appearance.

Erythroid (Erythr-oid) - having a reddish color or pertaining to red blood cells.

Erythron (Erythr-on) - total mass of red blood cells in the blood and the tissues from which they are derived.

Erythropathy (Erythro-pathy) - any type of disease that involves red blood cells.

Erythropenia (Erythro-penia) - deficiency in the numbers of erythrocytes.

Erythrophagocytosis (Erythro-phago-cyt-osis) - process involving the ingestion and destruction of red blood cells by a macrophage or other type of phagocyte.

Erythrophil (Erythro-phil) - cells or tissues that are readily stained with red dyes.

Erythrophyll (Erythro-phyll) - pigment that produces red coloration in leaves, flowers, fruit and other forms of vegetation.

Erythropoiesis (Erythro-poiesis) - process of red blood cell formation.

Erythropoietin (Erythro-poietin) - hormone produced by the kidneys that stimulates bone marrow to produce red blood cells.

Erythropsin (Erythr-opsin) - vision disorder in which objects appear to have a reddish tinge.