ULTRAMARINE, adjective [Latin ultra, beyond, and marinus, marine.] Situated or being beyond the sea. ULTRAMARINE, noun [supra.] 1. a beautiful and durable sky-blue; a color formed of the mineral called lapis lazuli, and consisting of little else than oxyd of iron. 2. Azure-stone. ULTRAMARINE ashes, a pigment which is the residuum of lapis lazuli, after the ultramarine has been extracted. Their appearance is that of the ultramarine a little tinged with red, and diluted with white.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI