spicule

noun

1. 1

   A sharp, needle-like piece.

2. 2

   A tiny glass flake formed during the manufacture of glass vials

3. 3

   Any of many needle-like crystalline structures that provide skeletal support in marine invertebrates like sponges.

4. 4

   A needle-like mating structure found only in male nematodes.

5. 5

   A jet of matter ejected from the photosphere of the sun.

6. 6

   A small spike of flowers.