(organic chemistry) Any ketone having three carbonyl groups

(mineralogy) Having all three octahedral sites occupied by cations

plural of triode

(biology) Having, or appearing to have, three eyes

plural of triolet

plural of triol

plural of triomino / (games) a variant of the game of dominoes using tiles with the shape of an equilateral triangle.

(medicine) The anesthetic drug 2,2-bis(ethylsulfonyl)butane.

A war monument in Paris, France, designed by Jean Chalgrin in 1806, started in 1808 and inaugurated in 1836.

(astrology) An aspect of two planets with regard to the Earth when they are three octants, or three eighths of a circle (135 degrees), distant from each other.