The Collaborative International Dictionary of English v.0.48:

Stringy \String"y\, a.
   1. Consisting of strings, or small threads; fibrous;
      filamentous; as, a stringy root.
      [1913 Webster]

   2. Capable of being drawn into a string, as a glutinous
      substance; ropy; viscid; gluely.
      [1913 Webster]

   Stringy bark (Bot.), a name given in Australia to several
      trees of the genus Eucalyptus (as Eucalyptus
      amygdalina, Eucalyptus obliqua, Eucalyptus
      capitellata, Eucalyptus macrorhyncha, Eucalyptus
      piperita, Eucalyptus pilularis, & Eucalyptus
      tetradonta), which have a fibrous bark used by the
      aborigines for making cordage and cloth.
      [1913 Webster]

WordNet (r) 3.0 (2006):

stringy
    adj 1: lean and sinewy [syn: stringy, wiry]
    2: (of meat) full of sinews; especially impossible to chew [syn:
       fibrous, sinewy, stringy, unchewable]
    3: forming viscous or glutinous threads [syn: ropy, ropey,
       stringy, thready]
    4: consisting of or containing string or strings

Moby Thesaurus II by Grady Ward, 1.0:

89 Moby Thesaurus words for "stringy":
   adhesive, amylaceous, besprinkle, capillary, cartilaginous, chewy,
   cirrose, cirrous, clabbered, clammy, clotted, coagulated, cohesive,
   coriaceous, curdled, doughy, durable, dust, fibered, fibroid,
   fibrous, flagelliform, flossy, funicular, gaumy, gelatinous,
   glairy, gluelike, gluey, glutenous, glutinose, glutinous, gooey,
   gossamery, gristly, grumous, gumbo, gumbolike, gumlike, gummous,
   gummy, hairlike, hairy, hard, hardy, heavy, inspissated, jelled,
   jellied, jellylike, lasting, leatherlike, leathery, ligamental,
   mucilaginous, pasty, powder, resistant, ropy, silky, sinewy,
   slabby, slimy, slithery, starchy, sticky, stiff, stodgy, strong,
   stubborn, syrupy, tacky, taeniate, taeniform, tenacious, thick,
   thickened, threadlike, thready, tough, tough as leather,
   tremelloid, tremellose, untiring, vigorous, viscid, viscose,
   viscous, wiry