from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A theoretically perfect absorber of all incident radiation.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. a theoretical body, approximated by a hole in a hollow black sphere, that absorbs all incident electromagnetic radiation and reflects none; it has a characteristic emission spectrum
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a hypothetical object capable of absorbing all the electromagnetic radiation falling on it
Sorry, no etymologies found.