Definition of acicular in English:
(Chiefly of crystals) needle-shaped.
- The acicular crystals are sometimes intergrown or twinned, causing a distortion that results in seemingly single crystals with relatively fat bases tapering to pointed terminations.
- All of the acicular crystals are late Neoproterozoic
- The largest amphibole crystals are embedded in the rock matrix, whereas the smaller acicular crystals line the hollows.
Early 18th century: from late Latin acicula 'small needle', diminutive of acus.
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