isomerize

1 of 2

verb

isom·​er·​ize ī-ˈsä-mə-ˌrīz How to pronounce isomerize (audio)
isomerized; isomerizing

intransitive verb

: to become changed into an isomeric form

transitive verb

: to cause to isomerize
isomerization noun

isomerization

2 of 2

noun

isom·​er·​i·​za·​tion
-ˌrīˈz-
plural -s
: the process of isomerizing (as of the straight-chain hydrocarbon butane to the branched-chain hydrocarbon isobutane of higher octane number for gasoline)

Word History

Etymology

Noun

International Scientific Vocabulary isomer + -ization

First Known Use

Verb

1891, in the meaning defined at intransitive sense

Time Traveler
The first known use of isomerize was in 1891

Browse Nearby Words

Cite this Entry

“Isomerize.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/isomerize. Accessed 19 Jun. 2026.

Medical Definition

isomerize

verb
isom·​er·​ize
variants also British isomerise
isomerized also British isomerised; isomerizing also British isomerising

intransitive verb

: to become changed into an isomeric form

transitive verb

: to cause to isomerize
isomerization noun
also British isomerisation
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster