acicular

from WordNet (r) 3.0 (2006)

acicular
    adj 1: narrow and long and pointed; as pine leaves [syn:
           {acerate}, {acerose}, {acicular}, {needle-shaped}]

from The Collaborative International Dictionary of English v.0.48

Acicular \A*cic"u*lar\, a.
   Needle-shaped; slender like a needle or bristle, as some
   leaves or crystals; also, having sharp points like needles.
   [1913 Webster] {A*cic"u*lar*ly}, adv..
   [1913 Webster] Aciculate