n. A distinguishing feature which marks something off from other members of the same family.
n. The attribute that distinguishes a species from others of the same genus
the GNU version of the Collaborative International Dictionary of English
n. The formal or distinguishing part of the essence of a species, by which it is distinguished from other members of its genus; the characteristic attribute of a species; specific difference.
n. the set of characteristics distinguishing an entity from related entities.
The Century Dictionary and Cyclopedia
n. In logic, the characteristic attribute of a species, or that by which it is distinguished from other species of the same genus; specific difference (which see, under difference).
n. In Gregorian music, a cadence or trope. Also called distinctio.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. distinguishing characteristics (especially in different species of a genus)
Word Usage
"The character that distinguishes one species from others within the same genus is called the differentia specifica."