solar cheilitis
[sō′lər]
n.
Mucosal atrophy, crusting, and fissuring of the border of the lips in old individuals, resulting from chronic exposure to sunlight.actinic cheilitis
RELATED CONTENT
A massive new planet in our solar system named Tyche? Maybe. But what does “Tyche” mean?There may be a new planet joining the solar system. A provocative hypothesis posed by a duo of planetary astronomers from the University of Louisiana-Lafayette includes the existence of the planet Tyche: a ninth planet estimated to be four times the size of Jupiter located somewhere at the outermost reaches of the solar system. It’s hard to know what is more enjoyable: stories about planets …
Why Do We Have Leap Year?Even though the standard calendar year is 365 days, the Earth actually takes 365 days 5 hours 48 minutes and 46 seconds to go completely around the sun. (This is called a solar year.) In order to keep the calendar cycle synchronized with the seasons, one extra day is (usually) added every four years as February 29th. The Julian calendar (established by Julius Caesar in …
Nearby words
- solar apex,
- solar battery,
- solar cell,
- solar cells,
- solar chariot,
- solar collector,
- solar constant,
- solar cycle,
- solar day,
- solar eclipse
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.