(mathematics) A geometric representation of the binomial coefficients in a triangle, each entry being the sum of the two entries above.

(law, India, dated in England & Wales) A tribunal with jurisdiction to hear labour disputes.

The quality of being tricky.

A three-dimensional figure with four triangular bases.

plural of triangular pyramid

Alternative spelling of trigger-happy

A female member of a tribe.

An empirical test of the suitability or effectiveness of a method or thing by running it at least once.

plural of trial run

(optics) Spectacles with corrective lenses that have three different powers per eye.