Definitions:
clearly defined or identified

relating to species or a species

(of a duty or a tax) levied at a fixed rate per physical unit of the thing taxed, regardless of its price.

of or denoting a number equal to the ratio of the value of some property of a given substance to the value of the same property of some other substance used as a reference, such as water, or of a vacuum, under equivalent conditions

a medicine or remedy effective in treating a particular disease or part of the body

a precise detail