Don't criticise something before having experienced it.

(transitive) to cut into three pieces / (transitive, mathematics) to divide a quantity, angle etc into three equal parts

Having, or pertaining to a system which involves, three sexes.

An organism (that is, a species) which has three sexes.

(humorous or derogatory) Of a person, willing to "try anything" sexually.

One who is trisexual.

(geometry) The division of an angle into three equal parts.

plural of trisection

(chemistry) Any compound containing three selenide groups

(biochemistry) An oligosaccharide consisting of three monosaccharide units joined together