The Collaborative International Dictionary of English v.0.48:

Spindling \Spin"dling\, a.
   Long and slender, or disproportionately tall and slender; as,
   a spindling tree; a spindling boy.

   Syn: spindly. [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Spindle \Spin"dle\, v. i. [imp. & p. p. Spindled; p. pr. & vb.
   n. Spindling.]
   To shoot or grow into a long, slender stalk or body; to
   become disproportionately tall and slender.
   [1913 Webster]

         It has begun to spindle into overintellectuality.
                                                  --Lowell.
   [1913 Webster]