D defs.my
Entry 2 senses Webster, 1913

Observator

· Ob·ser·va·tor · IPA /ɒbˈzɜːvətə/
01 n. One who observes or takes notice.
  1. 1.
    One who observes or takes notice.[Obs.]
  2. 2.
    One who makes a remark.[Obs.]