The Collaborative International Dictionary of English v.0.48:

Fuller \Full"er\, n. [AS. fullere, fr. L. fullo. See Full, v.
   t.]
   One whose occupation is to full cloth.
   [1913 Webster]

   Fuller's earth, a variety of clay, used in scouring and
      cleansing cloth, to imbibe grease.

   Fuller's herb (Bot.), the soapwort (Saponaria
      officinalis), formerly used to remove stains from cloth.


   Fuller's thistle or Fuller's weed (Bot.), the teasel
      (Dipsacus fullonum) whose burs are used by fullers in
      dressing cloth. See Teasel.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Saponin \Sap"o*nin\, n. [L. sapo, -onis soap: cf. F. saponine.]
   (Chem.)
   A poisonous glucoside found in many plants, as in the root of
   soapwort (Saponaria officinalis), in the bark of soap bark
   (Quillaja saponaria), etc. It is extracted as a white
   amorphous powder, which produces a soapy lather in solution,
   and produces a local anaesthesia. It is used as a detergent
   and for emulsifying oils. Formerly called also struthiin,
   quillaiin, senegin, polygalic acid, etc. By extension,
   any one of a group of related bodies of which saponin proper
   is the type.
   [1913 Webster + PJC]

The Collaborative International Dictionary of English v.0.48:

Soapwort \Soap"wort`\, n. (Bot.)
   A common plant (Saponaria officinalis) of the Pink family;
   -- so called because its bruised leaves, when agitated in
   water, produce a lather like that from soap. Called also
   Bouncing Bet.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Bouncing \Boun"cing\, a.
   1. Stout; plump and healthy; lusty; buxom.
      [1913 Webster]

            Many tall and bouncing young ladies.  --Thackeray.
      [1913 Webster]

   2. Excessive; big. "A bouncing reckoning." --B. & Fl.
      [1913 Webster]

   Bouncing Bet (Bot.), the common soapwort (Saponaria
      officinalis). --Harper's Mag.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Saponaria officinalis
    n 1: plant of European origin having pink or white flowers and
         leaves yielding a detergent when bruised [syn: soapwort,
         hedge pink, bouncing Bet, bouncing Bess, Saponaria
         officinalis]