Fungus (noun)

1. A type of organism that lacks chlorophyll and typically consists of a single cell or a colony of cells, including yeasts, molds, and mushrooms.
2. A condition or disease caused by a fungus, such as athlete's foot or ringworm.
3. A type of plant-like organism that does not produce seeds, but reproduces by spores.

Origin:

From latin fungus ("mushroom, fungus"), from proto-indo-european *dʰewh₁- ("to smoke, steam"). cognate with dutch paddestoel ("mushroom, toadstool"), german pilz ("mushroom, fungus"), old english fūm ("smoke, steam"). .

Examples:

1. The forest floor was covered in a variety of different fungi.
2. The bread was contaminated with a fungus, causing it to spoil.
3. The fungus on the apple was unappetizing, so he threw it away.
4. The fungus infected the plants root system, causing it to die.
5. The fungus was treated with an antifungal medication.