spiculate

from The Century Dictionary.

• To cover with or stick full with fine points, darts, etc.
• To sharpen to a point.
• In zoology, sharp-pointed; spicate.
• Covered with or divided into fine points.

from the GNU version of the Collaborative International Dictionary of English.

• transitive verb rare To sharpen to a point.
• adjective Covered with, or having, spicules.
• adjective (Bot.) Covered with minute spiculæ, or pointed fleshy appendages; divided into small spikelets.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb transitive To sharpen to a point.