trig - unia
- trigger
- trigonal axis
- trigonal bipyramide
- trigonal dipyramidal class
- trigonal holohedral class
- trigonal paramorphic hemihedral class
- trigonal prism
- trigonal pyramid
- trigonal pyramidal class
- trigonal system
- trigonal trapezohedral class
- trigonal trapezohedron
- trigonite
- trigonometrical point
- trikalsilite
- trilete
- trilobita
- trimerite
- trioxyanthraquinone
- tripartite observation
