Differentiae [noun]

Animal” names the general class, and “reasoning” is the differentia which separates “man” from other “animals.

The differentia should include all the members that the term denotes, and it should exclude all that it does not denote.

Find the genus and differentia in the definition of “a good book of the hour.”

Wilhelmi de Northfeilde expositio super librum de differentia spiritus et anim.

But the most obvious differentia of Whiggism was a dislike to the ecclesiastical spirit.

"Stated, fixed, or settled" is a predicate common to natural and supernatural, not the differentia of either.

I prefer—having been brought up at the feet of Logic—to stick to the genus and differentia of poetry, and not to its accidents.

This gives the 'differentia' of the Utilitarian considered as one species of the genus 'Radical.'

Obedience to the law enforced by these sanctions is obviously prudent, and constitutes the true differentia of moral conduct.

You remember my suggestion about the possible differentia in the vocal chords of the two races.