Acton (&unr_;), n. [OF. aketon, auqueton, F. hoqueton, a quilted jacket, fr. Sp. alcoton, algodon, cotton. Cf. Cotton.] A stuffed jacket worn under the mail, or (later) a jacket plated with mail. [Spelled also hacqueton.] [Obs.] Halliwell. Sir W. Scott.
[1913 Webster]