[ at-uh-pee ]
/ ˈæt ə pi /


an allergy, involving an inherited immunoglobulin of the IgE type, that predisposes a person to certain allergic responses, as atopic dermatitis.

Origin of atopy

1920–25; < Greek atopía extraordinariness, equivalent to átop(os) out of place, unusual (see a-6, topo-) + -ia -y3 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for atopy


/ (ˈætəʊpɪ) /


immunol a hereditary tendency to be hypersensitive to certain allergens
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for atopy


[ ătə-pē ]


A hereditary disorder marked by the tendency to develop immediate allergic reactions to substances such as pollen, food, dander, and insect venoms and manifested by hay fever, asthma, or similar allergic conditions.atopic allergy

Related forms

a•topic (ā-tŏpĭk) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.