acicular

adjective3

1. •
   Needle-shaped; slender like a needle or bristle.

   • Sometimes these networks have an acicular or crystalline appearance, and may grow visibly, sometimes with sudden jerks, “like frost on a windowpane,” or “primitive plants.” — 1992
2. •
   Of a leaf, slender and pointed, needle-like.

   • the acicular foliage of coniferous trees
3. •
   Having sharp points like needles.