erythro-, erythr-, ereuth-

(Greek: the color red, ruddy; blushing)

Reddish brown pigmentation of the teeth.
The ether-soluble fraction of the acid-precipitable part of the water-soluble pigments of litmus, occurring as a red oily substance.
A compulsion to blush over minor incidents or a mania for the color red; or by extension, an obsession about blood.
erythromelalgia, erythermalgia (s) (noun) (no pl)
A throbbing and burning pain in the skin: Erythromelalgia is often brought about by exertion or heat, affecting the hands and feet, accompanied by a mottled redness of the parts with increased skin temperature.

Erythromelalgia can be considered to be a rare disorder of middle age, characterized by paroxysmal attacks of severe burning pain, reddening, hyperalgesia and sweating, involving one or more extremities, usually both feet and the attacks can be triggered by heat, and are usually relieved by cold packs and limb elevation.

An instrument or color scale for measuring degrees of redness.
The measurement of the degree of redness.
erythropathy (s) (noun), erythropathies (pl)
In pathology, an illness connected with the impairment of the bone marrow, or erythroblasts: The cells in the fatty connective tissues filling the cavities in old Mrs. Smith's bones were infected and sick, and Dr. Green told her that this ailment was termed erythropathy
erythrophagous, erythrophage, erythrophagy
Phagocytic destruction of red blood cells.
A cell or other element that is easily stained red.
erythroprosopalgia (s) (noun), erythroprosopalgias (pl)
A disorder similar to erythromelalgia (burning pain in the skin), but with the pain and redness occurring in the face: Alice quickly went to the dermatologist to find out why her face hurt so much, and after the examination, Dr. Tall explained that she had a case of erythroprosopalgia which also caused the redness in her face.