adj.
Of, relating to, or caused by a hereditary predisposition toward developing certain hypersensitivity reactions, such as hay fever, asthma, or chronic urticaria, upon exposure to specific antigens: atopic dermatitis.
[From Greek atopiā, unusualness, from atopos, out of the way : a-, not; see a-1 + topos, place.]
atopy at'o·py (ăt'ə-pē) n.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
