thready

from WordNet (r) 3.0 (2006)

thready
    adj 1: forming viscous or glutinous threads [syn: {ropy},
           {ropey}, {stringy}, {thready}]
    2: thin in diameter; resembling a thread [syn: {filamentous},
       {filiform}, {filamentlike}, {threadlike}, {thready}]

from The Collaborative International Dictionary of English v.0.48

Thready \Thread"y\, a.
   1. Like thread or filaments; slender; as, the thready roots
      of a shrub.
      [1913 Webster]

   2. Containing, or consisting of, thread.
      [1913 Webster]

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