Deviating from the normal or common order, form, or rule.(adjective)
Equivocal, as in classification or nature.(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.
Use "anomalous" in a sentence
"The anomalous is more surprising – thus often a lot more interesting – than the normal and mundane."
"There's also the more self-conscious and deliberate indecision where the anomalous is explicable as an artifice of the nomology of narrative itself, a product of those "laws of reality" that cover the use of extended metaphor in fiction."
""Contact button," she muttered to herself, recalling the anomalous appearance of one on Noneth's hood."