D defs.my
Entry 3 senses Webster, 1913

Constrictor

/kən-strĭk'-tẽr/ · Con·strict·or · IPA /kənˈstɹɪk.tɚ/
01 n. That which constricts, draws together, or contracts.
  1. 1.
    That which constricts, draws together, or contracts.
  2. 2.
    A muscle which contracts or closes an orifice, or which compresses an organ; a sphincter.(Anat.)
  3. 3.
    A serpent that kills its prey by inclosing and crushing it with its folds; as, the boa constrictor.(Zool.)