Not able to be reduced or lessened. / Not able to be brought to a simpler or reduced form. / (mathematics, of a polynomial) Unable to be factorized into polynomials of lower degree, as (x² + 1).

(mathematics) Such a polynomial

plural of irreducible

The quality of being irreducible.

In an irreducible manner, or state.

(uncountable) The quality or degree of being irreducible. / (countable) Something that is irreducible.

plural of irreducibility

(biology, pseudoscience) The proposition that complex organs such as eyes and flagella must have started existing in their current form; i.e., that they cannot have evolved from previous, less complex stages.