I. ˌsəb-ˈhyü-mən, -ˈyü- adjective
Date: 1793
: less than human: as
a. : failing to attain the level (as of morality or intelligence) associated with normal human beings
b. : unsuitable to or unfit for human beings
subhuman living conditions
c. : of or relating to a taxonomic group lower than that of humans
the subhuman primates
II. noun
Date: 1937
: a subhuman being