Specific difference is that primary attribute which distinguishes each species from one another. I. Watts.

In fact, all medicines will be found specific in the perfection of the science. Coleridge.

Specific character (Nat. Hist.), a characteristic or characteristics distinguishing one species from every other species of the same genus. -- Specific disease (Med.) (a) A disease which produces a determinate definite effect upon the blood and tissues or upon some special tissue. (b) A disease which is itself uniformly produced by a definite and peculiar poison or organism. -- Specific duty. (Com.) See under Duty. -- Specific gravity. (Physics) See under Gravity. -- Specific heat (Physics), the quantity of heat required to raise temperature of a body one degree, taking as the unit of measure the quantity required to raise the same weight of water from zero to one degree; thus, the specific heat of mercury is 0.033, that of water being 1.000. -- Specific inductive capacity (Physics), the effect of a dielectric body in producing static electric induction as compared with that of some other body or bodies referred to as a standard. -- Specific legacy (Law), a bequest of a particular thing, as of a particular animal or piece of furniture, specified and distinguished from all others. Wharton. Burrill. -- Specific name (Nat., Hist.), the name which, appended to the name of the genus, constitutes the distinctive name of the species; -- originally applied by Linnæus to the essential character of the species, or the essential difference. The present specific name he at first called the trivial name. -- Specific performance (Law), the peformance of a contract or agreement as decreed by a court of equity.

His parents were weak enough to believe that the royal touch was a specific for this malady. Macaulay.