|Aloof.* To windward.
Alow. Below; low down; not aloft.
Alow and Aloft 12 Altostratus
Alow and Aloft. When applied to sails, means below and above the lower yards.
Alpha, a First letter of Greek alphabet. Commonly used as a symbol to denote a known quantity. Prefixed to name of a constellation, it denotes principal star in that constellation.
Alphard. Star Hydrae. S.H.A. 219°; Dec. S 08°; Mag. 2-2. Also called 'Cor Hydrae'.
Alphecca. Star Coronae Borealis. S.H.A. 127°; Dec. N 27°; Mag. 2-3.
Alpheratz. Star Andromedae. S.H.A. 358°; Dec. N 29°; Mag. 2-1. Alt. Abbreviation for 'Altitude'.
Altair. Star Aquilæ. S.H.A. 63°; Dec. N 9°; Mag. 0-9. Diameter is about that of Sun; candlepower is nine times greater; temperature is 8600°A; distance is 16 light years.
Altar. Step in a dry dock, on which lower ends of shores rest.
Alt-Azimuth. Contraction of 'Altitude-azimuth', the two horizon co-ordinates for fixing position of a heavenly body.
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