from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The degree to which a sunscreen, suntan lotion, or similar preparation protects the skin from ultraviolet rays, usually expressed numerically.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. an indication of how long a sunscreen remains effective when applied to the skin
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the degree to which a sunscreen protects the skin from the direct rays of the sun
Sorry, no etymologies found.