/tri plis"i tee/ , n. , pl. triplicities .
1. the quality or state of being triple; threefold character or condition.
2. a group or combination of three; triad.
3. Astrol. the division of the signs of the zodiac into four groups of three signs each, the fire signs, the earth signs, the air signs, and the water signs, with each sign separated from others within the group by 120 degrees of the ecliptic. Cf. element (def. 12).
[ 1350-1400; ME triplicite triplicitas threefold state. See TRIPLEX, -ITY ]