Dictionary.com
definitions

hyposensitize

[hahy-puh-sen-si-tahyz]

verb (used with object), hy·po·sen·si·tized, hy·po·sen·si·tiz·ing. Medicine/Medical.

to cause (a person) to become less sensitive to (a substance producing an allergic reaction); desensitize.
Also especially British, hy·po·sen·si·tise.

Origin of hyposensitize

First recorded in 1930–35; hypo- + sensitize
Related formshy·po·sen·si·ti·za·tion, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for hyposensitize

hyposensitize

hyposensitise

verb

(tr) to desensitize; render less sensitive
Derived Formshyposensitization or hyposensitisation, noun
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
hyposensitize in Medicine

hyposensitize

[hī′pō-sĕn′sĭ-tīz′]

v.

To make less sensitive, as to an allergen.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.