Source : Webster's Revised Unabridged Dictionary (1913)

Astringer \As*trin"ger\, n. [OE. ostreger, OF. ostrucier, F.
   autoursier, fr. OF. austour, ostor, hawk, F. autour; cf. L.
   acceptor, for accipiter, hawk.]
   A falconer who keeps a goshawk. [Obs.] --Shak. --Cowell.
   [Written also {austringer}.]