The Collaborative International Dictionary of English v.0.48:

Spiculate \Spic"u*late\, v. t.
   To sharpen to a point. [R.] "With spiculated paling."
   --Mason.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Spiculate \Spic"u*late\, a. [L. spiculatus, p. p. of spiculare
   to sharpen, to point, fr. spiculum a dart.]
   1. Covered with, or having, spicules.
      [1913 Webster]

   2. (Bot.) Covered with minute spiculae, or pointed fleshy
      appendages; divided into small spikelets.
      [1913 Webster]