in·​fra·​hu·​man ˌin-frə-ˈhyü-mən How to pronounce infrahuman (audio)
: less or lower than human
infrahuman primates
infrahuman noun

Word History

First Known Use

1847, in the meaning defined above

Time Traveler
The first known use of infrahuman was in 1847

Dictionary Entries Near infrahuman

Cite this Entry

“Infrahuman.” Dictionary, Merriam-Webster, Accessed 3 Oct. 2023.

Medical Definition


1 of 2 adjective
in·​fra·​hu·​man ˌin-frə-ˈhyü-mən, -ˈyü- How to pronounce infrahuman (audio)
: less or lower than human
especially : anthropoid sense 2
infrahuman primate populations


2 of 2 noun
: an animal and especially a primate that is not human

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