that is not to be eaten; that is not edible; not fit to be eaten.

any thing that is non-edible or unfit to be eaten.

(math.) ) transcendental - i.e. a) not capable of being a root of any algebraic equation with rational coefficients; b) of, pertaining to or being a function, as a logarithm, trigonometric function, exponential, etc., that is not expressible algebraically in terms of the variables and constants.