TRIGON
, a figure of three angles, or a triangle.
Trigon, in Astrology. See Triplicity.
Trigon, in Astronomy, denotes an aspect of two planets when they are 120 degrees distant from each other; called also a Trine, being the 3d part of 360 degrees.—The Trigons of Mars and Saturn are by astrologers held malific or malignant aspects.
Tbigon, in Dialling, is an instrument of a triangular form.
Trigon, in Music, denoted a musical instrument, used among the ancients. It was a kind of triangular lyre, or harp, invented by Ibycus; and was used at feasts, being played on by women, who struck it either with a quill, or beat it with small rods of different lengths and weights, to occasion a diversity in the sounds.
TRIGONAL Numbers. See Triangular Numbers.
TRIGONOMETER Armillary. See Armillary Trigonometer.
