Argentum. Skin layer of fishes. It makes them iridescent by reflecting light.
Argo. Southern constellation in about R.A. 6h to llh; Dec. 37°-70° S. Named after mythological ship of Jason. Divided, by Herschel, into various parts: keel (carina), mast (malus), poop (puppis), sails (vela); stars being named by astronomers—but not seaman—after their part of ship. Canopus is principal star. Argus (Carinae) is a variable star, going from Mag. 1 to 7 ½ in 70 years.
Argon.Gas forming nearly 1 per cent of atmosphere.
Argonauts. Legendary companions of Jason, in ship 'Argo', when he sailed to regain the Golden Fleece. 2. Sea creature, with tentacles and a shell, often seen floating on surface of sea.
Argosy. Large Adriatic merchant ship of middle ages. Word is used, poetically, for freight-carrying ships in general. Is a corrupt form of Ragusa, the principal port from which the argosy sailed.
Aries (The Ram). Constellation situated between R.A.s 01 h 45m and 03h and Dec. 15° to 25° N. Has two navigational stars a (Hamel) and £ Arietis. 2. First sign of Zodiac, extending from 0° to 30° celestial longitude. Sun is in this sign from March 21 to April 20 (about). Name is often used as a short form of 'First Point of Aries'.
Arisings.Old or damaged material that remains when repairs or refitting have been carried out.
Ark. Any enclosed vessel that will float. 2. Vessel, about the size of a medium liner, built by Noah. 3. Large boat formerly used on rivers of U.S.A. for transporting provisions.