trigonum trigoni N N :: triangle; three sided figure; triangular pill/tablet; 3 player ball game
trĭgōnum, ī, n., triangle : Varro L. 7, 95 ; Gell. 2, 21, 10 ; Col. Rust. 5, 10, 13.
trigonum, i. n. :: 三隅圖。角魚