The Collaborative International Dictionary of English v.0.48:

Acrylic \A*cryl"ic\, a.
   1. A paint in which the pigment is suspended in a solution of
      an acrylic resin, which dries to a hard film on exposure
      to air.
      [PJC]

   2. A painting made using an acrylic paint; as, he donated
      several of his acrylics to the museum.
      [PJC]

   3. Same as acrylic resin.
      [PJC]

   4. Same as acrylic fiber.
      [PJC]

The Collaborative International Dictionary of English v.0.48:

acrylic \a*cryl"ic\ ([.a]*kr[i^]l"[i^]k), a.
   1. (Chem.) Of or containing acryl, the hypothetical radical
      (R.CH:CH.CO-) of which acrolein (H2C:CH.CHO) is the
      hydride; as, acrylic acid. The characteristic residue in
      an acrylic compound is the carbonyl group attached
      directly to an ethylenic carbon.
      [1913 Webster +PJC]

   2. Of or pertaining to a derivative of acrylic acid, or an
      object consisting mostly of an acrylic resin; as, an
      acrylic window.
      [PJC]

WordNet (r) 3.0 (2006):

acrylic
    n 1: polymerized from acrylonitrile [syn: acrylic fiber,
         acrylic]
    2: a glassy thermoplastic; can be cast and molded or used in
       coatings and adhesives [syn: acrylic, acrylic resin,
       acrylate resin]
    3: used especially by artists [syn: acrylic, acrylic paint]
    4: a synthetic fabric

Moby Thesaurus II by Grady Ward, 1.0:

43 Moby Thesaurus words for "acrylic":
   Bakelite, Buna, Celluloid, Formica, Lucite, Mylar, PVC, Perspex,
   Plexiglas, Styrofoam, Teflon, acetate, acetate nitrate, alkyd,
   aminoplast, casein plastic, cellophane, cellulose acetate,
   cellulose ether, cellulose nitrate, cellulosic, coumarone-indene,
   epoxy, fluorocarbon plastic, furane, lignin, melamine, multiresin,
   neoprene, nitrate, nylon, phenolic urea, polyester,
   polymeric amide, polypropylene, polystyrene, polyvinyl chloride,
   resinoid, silicone resin, tetrafluoroethylene, urea,
   urea formaldehyde, vinyl