(historical) A particular purple dye or color. / An Israeli wine grape.

Popular anglicism of the Argonautika of Apollonios Rhodios.

(philosophy, linguistics) Explanation and analysis—often considered controversial—of one or more concepts or linguistic terms by means of an exposition of their linguistic origins.

(especially UK) To dispute a decision already made, when inappropriate to do so.

(computer graphics) alpha, red, green, blue: a system used to represent colors with various levels of translucency

(philosophy) The argument, famously made by Ludwig Wittgenstein (1889-1951), that a private language cannot exist.

An small, black ant belonging to the invasive species Linepithema humilis, originally from Argentina, but now found in many places throughout the world.

An Argand lamp.

A red-purple dye. / A cloth of this color, often woolen.

(archaic) An alloy of aluminium and silver.