The combining form xanth/o means?

• A. White
• B. Orange
• C. Yellow
• D. Purple

Answer: (C)

Xanth/o signals yellow in medical terminology. It comes from the Greek xanthos meaning yellow and is used in terms describing yellow coloration or pigment, such as xanthoderma (yellow skin), xanthophyll (yellow pigment in plants and the retina), and xanthoma (yellowish patches due to lipid deposits). Because the question is about what color this combining form denotes, yellow is the correct meaning. White would use leuko- or alb/o, and purple has its own roots, so they don’t fit this combining form.