differences in appearance between the males and females of a species
sexual dimorphism in American English
noun
the condition in which the males and females in a species are morphologically different, as with many birds
Derived forms
sexually dimorphic
Word origin
[1885–90]This word is first recorded in the period 1885–90. Other words that entered Englishat around the same time include: booster, classified, roller coaster, toner, zoom