---
kind: "section"
citation: "21 C.F.R. § 333.203"
title: "21"
number: "333.203"
heading: "Definitions."
url: "https://uscodex.org/cfr/21/333.203"
---

# §333.203. Definitions.


As used in this subpart:

- (a) **Antifungal.** A drug which inhibits the growth and reproduction of fungal cells and decreases the number of fungi present.
- (b) **Athlete's foot.** An infection of the feet caused by certain dermatophytic fungi.
- (c) **Dermatophyte.** A fungus that invades and lives upon the skin or in the hair or nails.
- (d) **Fungus.** Any of a large division of plants, including dermatophytes, yeasts, and molds, characterized by a simple cell structure and the absence of chlorophyll.
- (e) **Jock itch.** A chronic and recurrent infection caused by certain dermatophytic fungi; affects the upper, inner thighs and sometimes extends to the groin and the pubic area; the condition most frequently occurs in men, but may also occur in women.
- (f) **Ringworm.** A skin infection caused by certain dermatophytic fungi.

## Notes

### Source

Source: 58 FR 49898, Sept. 23, 1993, unless otherwise noted.

### Authority

Authority: 21 U.S.C. 321, 351, 352, 353, 355, 360, 371.

### Source

Source: 52 FR 47322, Dec. 11, 1987, unless otherwise noted.