The claim that a writer or speaker makes about a controversial issue.

(physics) A rare stable isotope of argon, ³⁸₁₈Ar, having eighteen protons and twenty neutrons; it amounts to about 0.06% of the element in nature

(physics) The major stable isotope of argon, ⁴⁰₁₈Ar, having eighteen protons and twenty-two neutrons; it amounts to about 99.6% of the element in nature

(physics) A rare stable isotope of argon, ³⁶₁₈Ar, having eighteen protons and eighteen neutrons; it amounts to about 0.3% of the element in nature

(theology, philosophy) A type of argument for the existence of God arguing that since every thing and event that begins at a point in time has a cause, there must be an uncaused first cause.

thus, therefore

crude tartar.

An argali (kind of sheep).

(informal) A term often conflated with begging the question in philosophy. / (philosophy, logic) An argument which commits the logical fallacy of assuming what it is attempting to prove.

(chiefly historical) Of or pertaining to Argentines of African descent.