D defs.my
Entry 2 senses Webster, 1913

Finder

/fīn'-dẽr/ · Find·er · IPA /ˈfaɪndəɹ/
01 n. One who, or that which, finds;
  1. 1.
    One who, or that which, finds;(Astron.)
  2. 2.
    A slide ruled in squares, so as to assist in locating particular points in the field of vision.(Micros.)