Final answer:
The medical term for a fungal infection of the nail is onychomycosis. Symptoms of onychomycosis include yellowing or discoloration of the nails, thickening, brittleness, and crumbling.
Step-by-step explanation:
The medical term for a fungal infection of the nail is onychomycosis. Onychomycosis is a common condition caused by various types of fungi, including dermatophytes and Candida species. It usually affects the toenails but can also affect the fingernails. Symptoms of onychomycosis include yellowing or discoloration of the nails, thickening, brittleness, and crumbling.