sexual dimorphism

American  

noun

1. the condition in which the males and females in a species are morphologically different, as with many birds.

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sexual dimorphism British  

noun

1. biology differences in appearance between the males and females of a species

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Other Word Forms

• sexually dimorphic
  adjective

Etymology

Origin of sexual dimorphism

First recorded in 1885–90

Example Sentences

"To me, the differences in sexual dimorphism among populations of beluga whales could indicate that mating systems also vary, and this is something we are currently working on," said O'Corry-Crowe.

From Science Daily • Jun. 4, 2026

The main groups in which the phenomenon has been recorded include animal species which feature strong sexual dimorphism; most often insects, especially butterflies, crustaceans, spiders, even lizards and rodents.

From Science Daily • Dec. 11, 2023

Because natural selection is limited to sexual dimorphism.

From Textbooks • Jun. 9, 2022

Many stick insects display extreme sexual dimorphism, with females unrecognizable from their male companions.

From New York Times • Dec. 1, 2020

Find also the breathing pores along the sides of the abdomen.Unlikeness between male and female is called "sexual dimorphism."

From A Guide for the Study of Animals by Lucas, Frederic