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 (spĭk′yo͞ol) 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.]

spic′u·lar (-yə-lər), spic′u·late (-yə-lĭt, -lāt′) adj.


n. pl. spic·u·la (-lə)
A small needlelike structure, such as a copulatory organ in a nematode.

[Latin spīculum, diminutive of spīca, point, ear of grain.]
References in classic literature ?
When nearly on the crest of the Portillo, we were enveloped in a falling cloud of minute frozen spicula.
truncatum, Haslea spicula, Luticola cohnii, Mastogloia belaensis and Seminavis strigosa were new record for Pakistan.
The purpose of Ascanius's hunting on the shore is not mentioned, but it is clear that his hunting of Silvia's stag is motivated by glory: ipse etiam eximiae laudis succensus amore /Ascanius curvo derexit spicula cornu.
Most Enchytraeidae remained on the family level in these papers; one taxon was erroneously identified as Marionina spicula sensu Nielsen & Christensen (1959).