spic·ule 
(spĭkyl) also spic·u·la (-yə-lə)
(spĭkyl) also spic·u·la (-yə-lə)n. pl. spic·ules also spic·u·lae (-yə-lē)
1. A small needlelike structure or part, such as one of the silicate or calcium carbonate processes supporting the soft tissue of certain invertebrates, especially sponges.
2. Astronomy A spike-shaped formation emanating from the ionized gas of the solar photosphere.
[Latin spīculum; see SPICULUM.]
spicu·lar (-yə-lər), spicu·late (-yə-lĭt, -lāt′) adj.
- unconcernedly
- unconcernedness
- unconditional
- unconditionality
- unconditionally
- unconditioned
- unconditionedness
- unconditioned response
- unconditioned stimulus
- unconformability
- unconformable
- unconformably
- unconformity
- uncongenial
- uncongeniality
- unconnected
- unconnectedly
- unconnectedness
- unconquerable
- unconquerably
- unconscionable
- unconscionableness
- unconscionably
- unconscious
- unconsciously