The Collaborative International Dictionary
Sexual \Sex"u*al\, a. [L. sexualis, fr. sexus sex: cf. F. sexuel.] Of or pertaining to sex, or the sexes; distinguishing sex; peculiar to the distinction and office of male or female; relating to the distinctive genital organs of the sexes; proceeding from, or based upon, sex; as, sexual characteristics; sexual intercourse, connection, or commerce; sexual desire; sexual diseases; sexual generation.
Sexual dimorphism (Biol.), the condition of having one of the sexes existing in two forms, or varieties, differing in color, size, etc., as in many species of butterflies which have two kinds of females.
Sexual method (Bot.), a method of classification proposed by Linn[ae]us, founded mainly on difference in number and position of the stamens and pistils of plants.
Sexual selection (Biol.), the selective preference of one
sex for certain characteristics in the other, such as
bright colors, musical notes, etc.; also, the selection
which results from certain individuals of one sex having
more opportunities of pairing with the other sex, on
account of greater activity, strength, courage, etc.;
applied likewise to that kind of evolution which results
from such sexual preferences.
--Darwin.
In these cases, therefore, natural selection seems
to have acted independently of sexual selection.
--A. R.
Wallace.
Wiktionary
n. A physical difference between male and female individuals of the same species.
Wikipedia
Usage examples of "sexual dimorphism".
This sexual dimorphism and the dominance/submission equations do not require institutionalized slavery.
On many worlds it is well known, though on others the information is suppressed, that biological realities exist, such as dominance and submission, strength and vulnerability, reciprocal needs, jealousy, possessiveness, protectiveness, sexual dimorphism and its meaning, claimancy and command, behavioral genetics, readinesses to respond to sign stimuli, longings for completeness, the desire to belong to, and yield to, the master animal, and such.
The sexual dimorphism among the owoc makes the miniscule differences between human males and females positively subatomic.
The actual social structure of those chimps that were to become human is not known, but there does seem to have been an increased sexual dimorphism: the males became significantly larger than the females.
What he thought about sexual dimorphism was mostly charitable compassion for the nasty predicaments females found themselves in every month, and the even worse ones that confronted them in childbearing.
These physical features suggest elevated levels of hormones linked with sexual differentiation and sexual dimorphism.
He surveyed the length of her body, shocked slightly once again by the various manifestations of sexual dimorphism.