Musculosity

MUSCULOSITY [Muſculoſitas, L.] bigneſs of Muſcles.

Sometimes the skin, particularly that covering the scrotum, throws itself, from cold, into alternate contractions and dilatations, which has a greater resemblance to musculosity, than that slow, gradual, and tonic-like action of the bladder on expelling urine.

[…]the moral “nature of man must be cultivated and trained to accept a condition in which his ‘musculosity’ alone establishes his essential difference;”[…]

The sterile septa have been termed muscle-septa, because the musculosity in them is said to be much more fully than is the case with the other septa, which have been termed reproductive septa.

The other physical differentiations are also biologically determined such as musculosity, height, weight, bodily structure, pelvis, broad hips and things and so on.