Join Us On

An Encyclopædia Britannica Company

Spanish Central

Browse Dictionary Browse Thesaurus

Get our free apps!iPhone•iPad•Android

Word of the Day

Blog: Words at Play

Dictionary

mirex

noun mi·rex \ˈmī-ˌreks\

Definition of MIREX

: an organochlorine insecticide C₁₀Cl₁₂ formerly used especially against ants

ADVERTISEMENT

Origin of MIREX

origin unknown

First Known Use: 1962

Rhymes with MIREX

annex, apex, codex, complex, convex, cortex, culex, desex, duplex, DX, fourplex, ibex, ilex, index, Kleenex, latex, murex, MX, narthex, perplex, Perspex, phone sex, pollex, Pyrex, reflex, Rx, safe sex, scolex, silex, silvex, simplex, spandex, telex, Tex-Mex, triplex, unsex, vertex, vortex

Medical Dictionary

mirex

noun mi·rex \ˈmī-ˌreks\

Medical Definition of MIREX

: an organochlorine insecticide C₁₀Cl₁₂ formerly used especially against ants that is a suspected carcinogen

Browse

Next Word in the Dictionary: mirinPrevious Word in the Dictionary: mirepoixAll Words Near: mirex

ADVERTISEMENT

Seen & Heard

What made you want to look up mirex? Please tell us where you read or heard it (including the quote, if possible).

View Seen & Heard Highlights from Around the Site

Test Your Vocabulary!

10 Charming Words for Nasty People

Put-downs with flair

When "Literally" isn't, well, literal

How to use a word that (literally) drives some people nuts.

Know what this is?

Test your vocab with our fun, fast game

Ailurophobia, and 9 other unusual fears

Join Us

Merriam-Webster
on Facebook

Merriam-Webster
on Twitter

Bookstore: Digital and Print

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

See All

Other Merriam-Webster Dictionaries

© Merriam-Webster, Incorporated