D defs.my
Entry 1 sense Webster, 1913

Retentor

· Re·ten·tor · IPA
01 n. A muscle which serves to retain an organ or part in place, esp. when retracted. See Illust. of Phylactolemata.
  1. 1.
    A muscle which serves to retain an organ or part in place, esp. when retracted. See Illust. of Phylactolemata.(Zool.) See: Phylactolemata