What is the definition or description of: fungal nail infection?

Fungus in the nail: Fungus is an organism that thrives in a dark, damp environment and can be found on the skin or nails. As we age, we are more prone to developing fungus in our nails. Also diabetics are very commonly seen with fungal nails. There is usually thickness, yellowish discoloration, and the presence of dead tissue under the nail when a person has fungus in their nail.

See below: It is a condition where the nail becomes infiltrated with a fungus (usually trichodum rubrum) creating nail thickening, discoloration and brittleness.

A nail : Infected by a fungus. A fungus is a living organism. When the fungus infects the toenail it can make the nail thick and ugly in appearance. It can cause discoloration and have malodor.

Fungus: When you have a fungal nail infection, a specific type of fungus can cause the nail to become discolored, thick, dystrophic, and my cause sublingual debris.

Fungal infected nail: Fungal nail infection occurs when a fungus grows in and around your fingernail or toenail. Symptoms may include: brittleness, change in nail shape and thickness, crumbling of the outside edges of the nail, debris trapped under the nail, loosening or lifting up of the nail, loss of luster and shine, and discoloration of the nails.