discriminant

The definition of a discriminant is some distinguishing characteristic or feature that allows someone or something to be separated from others.

(noun)

Whether a plant is an annual or a perennial is an example of a discriminant.

See discriminant in Webster's New World College Dictionary

noun

Math. an expression whose value or sign is used to classify functions

See discriminant in American Heritage Dictionary 4

noun

An expression used to distinguish or separate other expressions in a quantity or equation.

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