In astrology, a planet distant from another one-third of the
circle is said to be in trine; one-fourth, it is in square; one-sixth
or two signs, it is in sextile; but when one-half distant, it is said
to be “opposite.”
N.B. Planets distant from each other six signs or half a circle have
opposite influences, and are therefore opposed to each other.
More on Trine from Infoplease:
See a map of "" in the Visual Thesaurus
