SEXUAL DIMORPHISM By N., Pam M.S. - April 13, 2013 the existence in a species of males and females that are different from other males and females. See sex characteristics; sex differences. SEXUAL DIMORPHISM: "Sexual dimorphism is seen in males and females." Related Psychology Terms PARENTAL INVESTMENT THEORY SEX DIFFERENCES OPERATIONAL SEX RATIO VANDENBERGH EFFECT SCRAMBLE COMPETITION CRYPTIC FEMALE CHOICE POLYGYNANDRY MALE-MALE COMPETITION WHITTEN EFFECT FEMALE CHOICE Cite this page: N., Pam M.S., "SEXUAL DIMORPHISM," in PsychologyDictionary.org, April 13, 2013, https://psychologydictionary.org/sexual-dimorphism/ (accessed January 22, 2020).