differentia

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

From English: Composition and Literature by W. F. (William Franklin) Webster

The differentia is that part of a definition which names the difference between the term defined and the general class to which it belongs.

From English: Composition and Literature by W. F. (William Franklin) Webster

Genus and differentia are found in every good definition.

From English: Composition and Literature by W. F. (William Franklin) Webster

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

From English: Composition and Literature by W. F. (William Franklin) Webster

Not a little error has resulted from the confusion of thought whereby genus and differentia have been regarded as material and formal constitutives in the literal sense of those expressions.

From Ontology or the Theory of Being by Peter Coffey

It is like as in the study of plants—classification by differentiae.

From Chinese Literature Comprising the Analects of Confucius, the Sayings of Mencius, the Shi-King, the Travels of Fâ-Hien, and the Sorrows of Han by Sir John Francis Davis

The Vicar, you must understand, had done his best to inculcate the recognised differentiae of a gentleman.

From The Wonderful Visit by H. G. (Herbert George) Wells

Similarly the differentiae are predicated of the species and of the individuals.

From The Categories by E. M. Edghill

After all, what are the chief differentiae between man and the brute creation but that he clothes himself, that he cooks his food, that he uses articulate speech?

From On the Art of Writing Lectures delivered in the University of Cambridge 1913-1914 by Sir Arthur Thomas Quiller-Couch

Yet this is not peculiar to substance, for it is also the case that differentiae cannot be present in subjects.

From The Categories by E. M. Edghill