spicule


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
Related to spicule: spongin

spicule

 [spik´ūl]
a sharp, needle-like body or spike.

spic·ule

(spik'yūl),
1. A small needle-shaped body.
2. Accessory reproductive structure in male nematodes; useful in identification of species.
[L. spiculum, dim. of spica, or spicum, a point]

spicule

/spic·ule/ (spik´ūl) a sharp, needle-like body.

spicule

(spĭk′yo͞ol) also

spicula

(-yə-lə)
n. pl. spic·ules also spic·ulae (-yə-lē)
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.

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

spicule

[spik′yo̅o̅l]
Etymology: L, spiculum, point
a small sharp body with a needlelike point.

spic·ule

(spik'yūl)
A small, needle-shaped body.
[L. spiculum, dim. of spica, or spicum, a point]

spicule

  1. a small spiked structure in male nematode worms that assists in copulation.
  2. a slender rod of calcium carbonate found in sponges, that supports the soft wall.

spicule

small spike at outer margin of the nail plate that can penetrate local nail wall (causing paronychia/ingrowing toenail) or cause local pain (i.e. a hang nail)

spic·ule

(spik'yūl)
A small, needle-shaped body.
[L. spiculum, dim. of spica, or spicum, a point]

spicule (spik´ūl),

n a small needle-shaped body.

spicule

1. a sharp, needle-like body or spike.
2. part of the male genital apparatus in nematodes; they engage the female genital orifice during copulation.
References in periodicals archive ?
If spicules and chromospheric matter are genuinely the product of condensation reactions, then their mechanism of formation might shed great light into the emissive nature of this solar layer.
Counter to these ideas, the metallic hydrogen model holds that spicules are the product of condensation reactions (see [section]3.
A technique for detecting matrix proteins in the crystalline spicule of the sea urchin embryo.
GENITALIA: Endosoma: with gently curved, gradually pointed, moderately long spicule (Figs.
It had large caudal alae, several pairs of pedunculated papillae (Figure 1, panel B), unequal spicules, a short and thick tail, and an esophagus with a wider glandular region.
Researchers hope this will reveal more about the spicule heating and launch mechanisms.
After photographing the specimen, small pieces of dermal and atrial surfaces were wholemounted in Canada balsam for light microscopy and digested in hot nitric acid for spicule cleaning.
Telford (1965) studied three endemic species from Colima, Mexico and considered the following characteristics taxonomically significant for species determination: total body length, arrangement of male caudal papillae, appearance of the distal tip of the left spicule, vulvar sphincter morphology, and comparative ratio's of esophageal length and distance of vulva from anterior end.
4F, 7D); ventral endosomal spicule always present, elongate, either smooth (Figs.
The larger left spicule had a typical beveled extremity.