: an alloantigen that is part of a plasma protein (such as an antibody)

Word History

Etymology

borrowed from French, from allo- allo- + -type type entry 1

First Known Use

1960, in the meaning defined above

Time Traveler
The first known use of allotype was in 1960

Browse Nearby Words

Cite this Entry

“Allotype.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/allotype. Accessed 7 Jul. 2026.

Medical Definition

allotype

noun
: an alloantigen that is part of a plasma protein (as an antibody) compare idiotype, isotype
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