D defs.my
Entry 2 senses Webster, 1913

Pacifier

/păs'-əf-īˌ-ẽr/ · Pac·i·fi·er · IPA /ˈpæsɪfaɪɚ/
01 n. One who or that which pacifies.
  1. 1.
    One who or that which pacifies.
  2. 2.
    A small device, usually of rubber or plastic containing a protruding nipple-shaped portion which a baby may place in its mouth and suck on; -- it is used to keep babies contented.