D defs.my
Entry 1 sense Webster, 1913

Sinical

· Sin·i·cal · IPA
01 a. Of or pertaining to a sine; employing, or founded upon, sines; as, a sinical quadrant.
  1. 1.
    Of or pertaining to a sine; employing, or founded upon, sines; as, a sinical quadrant.(Trig.)