---
kind: "section"
citation: "21 C.F.R. § 333.303"
title: "21"
number: "333.303"
heading: "Definitions."
url: "https://uscodex.org/cfr/21/333.303"
---

# §333.303. Definitions.


As used in this subpart:

- (a) **Acne.** A disease involving the oil glands and hair follicles of the skin which is manifested by blackheads, whiteheads, acne pimples, and acne blemishes.
- (b) **Acne blemish.** A flaw in the skin resulting from acne.
- (c) **Acne drug product.** A drug product used to reduce the number of acne blemishes, acne pimples, blackheads, and whiteheads.
- (d) **Acne pimple.** A small, prominent, inflamed elevation of the skin resulting from acne.
- (e) **Blackhead.** A condition of the skin that occurs in acne and is characterized by a black tip.
- (f) **Whitehead.** A condition of the skin that occurs in acne and is characterized by a small, firm, whitish elevation of the skin.

## Notes

### Source

Source: 56 FR 41019, Aug. 16, 1991, 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.