Source : Webster's Revised Unabridged Dictionary (1913)

Laudanum \Lau"da*num\, n. [Orig. the same wort as ladanum,
   ladbdanum: cf. F. laudanum, It. laudano, ladano. See
   {Ladanum}.]
   Tincture of opium, used for various medical purposes.

   Note: A fluid ounce of American laudanum should contain the
         soluble matter of one tenth of an ounce avoirdupois of
         powdered opium with equal parts of alcohol and water.
         English laudanum should have ten grains less of opium
         in the fluid ounce. --U. S. Disp.

   {Dutchman's laudanum} (Bot.) See under {Dutchman}.

Dutchman \Dutch"man\, n.; pl. {Dutchmen}.
   A native, or one of the people, of Holland.

   {Dutchman's breeches} (Bot.), a perennial American herb
      ({Dicentra cucullaria}), with peculiar double-spurred
      flowers. See Illust. of {Dicentra}.

   {Dutchman's laudanum} (Bot.), a West Indian passion flower
      ({Passiflora Murucuja}); also, its fruit.

   {Dutchman's pipe} (Bot.), an American twining shrub
      ({Aristolochia Sipho}). Its flowers have their calyx tubes
      curved like a tobacco pipe.