In a tristful manner; sadly.

simple past tense and past participle of tristitiate

(obsolete, transitive) To sadden.

(organic chemistry) Any ester containing three stearate groups

(botany) Having, or consisting of, three stigmas.

(zoology) Any extinct fish in the family Tristichopteridae.

plural of tristichopterid

plural of tristearate

A set of three stimuli, especially the red, green and blue components of colour vision.

plural of tristimulus