rad Hear it!

rad1 definition

rad (rad)

noun

a basic unit of an absorbed dose of radiation, equal to the absorption of 100 ergs of energy per gram of material or 0.01 joule per kilogram of material (0.01 gray or 1.1 roentgen)

Etymology: < rad(iation)

rad2 definition

rad

  1. radian(s)
  2. radical
  3. radius
  4. radix

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

Comments
Improve this definition.
Do you have more to add? Share your linguistic knowledge or observation.
/Register to save your comments.