What combining form refers to poison or toxin?

The combining form that refers to poison or toxin is "tox/o." This term is derived from the Greek word "toxikon," which means poison. In medical terminology, it is used in words related to the study of poisons, toxicology, and various conditions caused by toxins. For example, terms like "toxic" (poisonous) and "toxoplasmosis" (an infection caused by a protozoan that can be harmful) utilize this combining form to indicate the presence or relationship to poisons.

The other combining forms do not relate to poison or toxins. "Py/o" refers to pus, often used in words associated with infection. "Hepat/o" denotes the liver, relating to hepatic conditions and diseases. "Cholescyst/o" pertains to the gallbladder, specifically in terms related to gallbladder disorders, and does not connect to the concept of toxicity or poison. Understanding these distinctions and the correct use of "tox/o" is crucial for interpreting medical terminology accurately, especially in contexts involving toxic substances and their effects on health.