Definition of "intra-atomic" [intra-atomic]

• Within an atom. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "A peculiar bauble indeed, impossible of duplication because of some subtlety of intra-atomic arrangement, and possessing peculiar and dire potentialities."
• "Take all this stuff, for instance; especially their ability to transform iron into a fluid allotrope, and in that form to use its intra-atomic energy as power."
• "It's hard to say that anything's impossible, of course, except things made so by definition or by being contrary to observational facts, but the best work shows that intra-atomic energy is just about as impossible as anything can well be."