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n. pl. a·cic·u·lae (-lē′)
A slender, needlelike part or structure, such as a spine or bristle of certain plants and animals or a crystal of certain minerals.

[Latin, hairpin, diminutive of acus, needle; see ak- in Indo-European roots.]

a·cic′u·late (-lĭt, -lāt′), a·cic′u·lat′ed (-lā′tĭd) adj.


n, pl -lae (-ˌliː)
a needle-shaped part, such as a spine, prickle, or crystal
[C19: New Latin, diminutive of acus needle]
aˈcicular adj


(əˈsɪk yə lə)

n., pl. -lae (-ˌli)
a needlelike part; spine, bristle, or needlelike crystal.
[1875–80; < New Latin, Late Latin, alter. of acucula ornamental pin = Latin acu-, s. of acus needle (compare acute) + -cula -cule1]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.acicula - a needlelike part or structure of a plant or animal or crystalacicula - a needlelike part or structure of a plant or animal or crystal; as a spine or bristle or crystal
part, piece - a portion of a natural object; "they analyzed the river into three parts"; "he needed a piece of granite"


A sharp or tapered end:
References in periodicals archive ?
Diagnosis: The antennae and peristomial cirri are short and the aciculae are black, as are the bidentate subacicular hooks.
Then come more eccentricities: tiny crumbs of rare species lost amid yellowing layers and more layers of cotton nesting; odd-looking powders and flakes and sands and aciculae in assortments of vials and pipettes and miniature paper boxes; labels proposing straight-faced such species and/or varietal names as might have bemused Agricola.
On the contrary, some features were regarded as useful such like the start of branchiae and their development, as far as the specimen's age is taken into account, and the color of aciculae.