Educational Content: This article is for informational purposes only and does not constitute medical advice. Always consult a healthcare provider for diagnosis and treatment.

Definition of Bi

Medically reviewed by Dr. Otari Nergadze, Neurosurgeon | Updated: January 2026

Bi-: Prefix indicating two, as in biceps (a muscle with two heads) or bicuspid (having two flaps or cusps).

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