from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A triangular lyre or harp of Roman and Greek antiquity.
- noun Archaic A triangle.
from The Century Dictionary.
- noun A trig; a skid.
- noun The prominent anterior portion of an upper molar tooth forming a triangular area at whose angles are the three principal cusps —the protocone, paracone, and metacone. The study of the Mesozoic mammals has left no doubt that the upper and lower triangles, or ‘trigon’ and ‘trigonid,’ were derived from the reptilian protocone by the addition of lateral cusps. See cut under
- noun A triangle.
- noun In astrology: The junction of three signs, the zodiac being divided into four trigons: the watery trigon, which includes Cancer, Scorpio, and Pisces; the earthly trigon, Taurus, Virgo, and Capricornus; the airy trigon, Gemini, Libra, and Aquarius; and the fiery trigon, Aries, Leo, and Sagittarius.
- noun Trine: an aspect of two planets distant 120 degrees from each other.
- noun In antiquity: A kind of triangular lyre or harp. Also called
- noun A game at ball played by three persons standing so as to be at the angles of a triangle.
- noun An instrument of a triangular form, used in dialing.
- noun In conchology, a shell of the genus Trigonia.
- noun An abbreviation of trigonometrical; of trigonometry.
from the GNU version of the Collaborative International Dictionary of English.
- noun A figure having three angles; a triangle.
- noun A division consisting of three signs.
- noun Trine, an aspect of two planets distant 120 degrees from each other.
- noun A kind of triangular lyre or harp.
- noun A kind of game at ball played by three persons standing at the angular points of a triangle.
- noun (Zoöl.) The cutting region of the crown of an upper molar, usually the anterior part. That of a lower molar is the Tri"go*nid (�).
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun geometry, rare A
- noun An ancient
triangular harpof Orientalorigin which had four stringsand was often used for banquetmusic. Also called sabbeka, sackbut, sambuca.
- noun astrology A
divisionconsisting of three signs.
- noun astrology A
trine; an aspectof two planetsdistant 120 degreesfrom each other.
- noun An old
ball gameplayed by three people standing in a triangular formation.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a three-sided polygon
- noun (astrology) one of four groups of the zodiac where each group consists of three signs separated from each other by 120 degrees
- noun a triangular lyre of ancient Greece and Rome
from The American Heritage® Dictionary of the English Language, 4th Edition
from Wiktionary, Creative Commons Attribution/Share-Alike License
One of the facts that plays a large part in the result was known to the old astrologers, viz. that Jupiter and Saturn come into conjunction with a certain triangular symmetry; the whole scheme being called a trigon, and being mentioned several times by Kepler.
This is actionable, affordable, and feasible and more aptly it addresses the problem in situ meaning that the fix goes in without having to reset the pieces on the game board.www. trigon-international.com
The last time I had ventured into the room, a hodgepodge of toys had been shoved into the niche -- little boats made of wood, a leather ball for playing trigon, pebbles of colored glass for Egyptian board games.
His musics,  his trigon, his golden thigh, 
Figure 74 is a trigon, the angles at its centre being 120, and the angle at the circumference being 60, as marked.
In short, whoever takes his ephemeris in one hand and history in the other, will have no difficulty in convincing himself of the efficacy of such configurations; and though, by changing the signs, they may vary the effects and also the places most subject to their influence, yet it will appear that the observations of different authors (wherein they all agree that England is most passive to the fiery trigon) are founded on truth.
The episematic torculus is seen in the final neuma of nobis (before the first trigon).
This is also sometimes used for one of the puncta of the climacus (first syllable of tuam, third and sixth neums, etc.) and towards the end of the group neuma on nobis (fifth sign from the end) we see a trigon subpuncte, the last dot of the trigon and the added punctum being drawn out.
On the first syllable of equas a tristopha takes the place of the trigon.
It can produce white noise signals, sine wave, square wave, trigon wave, beat wave, sweep sine wave and a signal defined by a windows WAV file.