trifocal
adjEtymology By surface analysis, tri- + focal, or, by surface analysis, tri- + foc(us) + -al.
1
Engineering, Natural sciences, Optics, Physical sciences, Physics Involving three foci.
2
Engineering, Natural sciences, Optics, Physical sciences, Physics Of or pertaining to corrective lenses that have three different powers per eye.
- Derived terms
- trifocalization