An Encylopedia Britannica Company

Learner's Dictionary mobile search

×

Learner's Dictionary

antihistamine

1 ENTRIES FOUND:

antihistamine (noun)

Save

antihistamine /ˌæntɪˈhɪstəˌmiːn/ noun

plural antihistamines

antihistamine

/ˌæntɪˈhɪstəˌmiːn/

noun

plural antihistamines

Learner's definition of ANTIHISTAMINE

[count, noncount] medical

: a drug that is used to treat allergic reactions and colds

Comments & Questions

Comments & Questions

What made you want to look up antihistamine? Include any comments and questions you have about this word.

ASK THE EDITOR

Which one is the correct verb? The first chapter and the second chapter (is/are) exciting.

See the answer »

LEARNER'S QUIZZES

Vocabulary Quiz Icon

Vocabulary Quiz

Test your word power

Take the Quiz »

Name That Thing Icon

Name That Thing

Take our visual quiz

Test Your Knowledge »

LEARNER'S WORD OF THE DAY

Foolish Illustration

: having or showing a lack of good sense or judgment

Learn More »

The Merriam-Webster
Unabridged Dictionary

Merriam-Webster Unabridged Book Cover

Online access to a
legendary resource
Log In or Sign Up »

Learning Spanish?
We can help

Learner's Dictionary Book Cover

Visit our free site designed
especially for learners and
teachers of Spanish
SpanishCentral.com »

Woman With Cell Phone

Our Dictionary,
On Your Devices

Merriam-Webster,
With Voice Search
Get the Free Apps! »

Merriam-Webster's
Visual Dictionaries

Visual Dictionary Book Cover

The new edition of the
remarkable reference
features 8,000
illustrations.
Learn More »

Join Us

Learner's Dictionary
on Twitter »

Learner's Dictionary
on Facebook »

Bookstore: Digital and Print

Merriam-Webster references for Mobile, Kindle, print, and more. See all »

Other Merriam-Webster Dictionaries

Webster's Unabridged Dictionary » Britannica English - Arabic Translation » Nglish - Spanish-English Translation »

Spanish Central » Visual Dictionary » WordCentral for Kids »

Browse the Learner's Dictionary

© 2020 Merriam-Webster, Incorporated