Which combining form refers to the color red?

The combining form that refers to the color red is "erythr/o." This term is derived from the Greek word "erythros," which specifically means red. In medical terminology, this combining form is often used to describe conditions related to the red blood cells or to indicate redness in tissues or other bodily reactions.

For example, terms such as "erythrocyte" (a type of red blood cell) and "erythema" (redness of the skin) utilize "erythr/o" to denote the presence of red. Understanding the significance of this combining form is essential for recognizing and interpreting medical terms that involve coloration.