hy·per·sen·si·tive

[hahy-per-sen-si-tiv]
adjective
1.
excessively sensitive: to be hypersensitive to criticism.
2.
allergic to a substance to which persons do not normally react.

Origin:
1870–75; hyper- + sensitive

hy·per·sen·si·tive·ness, hy·per·sen·si·tiv·i·ty, noun
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World English Dictionary
hypersensitive (ˌhaɪpəˈsɛnsɪtɪv) [Click for IPA pronunciation guide]
 
adj
1.  having unduly vulnerable feelings
2.  abnormally sensitive to an allergen, a drug, or other agent
 
hyper'sensitiveness
 
n
 
hypersensi'tivity
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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00:10
Hypersensitive is always a great word to know.
So is quincunx. Does it mean:
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
American Heritage
Medical Dictionary

hypersensitive hy·per·sen·si·tive (hī'pər-sěn'sĭ-tĭv)
adj.
Responding excessively to the stimulus of a foreign agent, such as an allergen; abnormally sensitive.


hy'per·sen'si·tive·ness or hy'per·sen'si·tiv'i·ty (-tĭv'ĭ-tē) n.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
However, for reasons not completely understood, some people are hypersensitive
  to substances that are typically harmless.
He sits in his cell at the reformatory- hypersensitive, intelligent, and bitter.
Before this study, researchers had demonstrated two ways for animals to become
  hypersensitive after injury.
What struck me was the inane outcry by hypersensitive people who obviously must
  not have anything important to do in their lives.
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