Fungus

Part of speech: noun (n.)

1. Any one of the Fungi, a large and very complex group of thallophytes of low organization, -- the molds, mildews, rusts, smuts, mushrooms, toadstools, puff balls, and the allies of each.

2. A spongy, morbid growth or granulation in animal bodies, as the proud flesh of wounds. Hoblyn.