trigonal
/ˈtrɪgənəl/adjective
1- triangular三角的, 三角形的：
square or trigonal double-sided inserts.
正方形或三角形双面插页（或散页）广告。
1.1
- chiefly Biology triangular in cross section【主生】三棱的, 横断面呈三棱的：
large trigonal shells
大型三棱贝壳。
1.2
- of or denoting a crystal system or three-dimensional geometrical arrangement having three equal axes separated by equal angles that are not right angles三方晶系的。
派生词
trigonally
adverb词源
late 16th cent.: from medieval Latin trigonalis, from Latin trigonum （see TRIGON）.