- shaped like a needle.
- (of cast iron) containing ferrite in a needlelike form.
- (of an alloy) having a microstructure of needlelike components.
Origin of acicular
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for acicular
By repeated solutions in alcohol it may be obtained under the form of white, silky, acicular crystals.
By re-solution in alcohol it may be obtained under the form of colourless, prismatic, acicular crystals.
It crystallizes in the orthorhombic system, and the crystals are either prismatic or acicular in habit.
They were not small and acicular, were nearly alike in the three basins, and had effloresced only on a few minute points.
Acicular, as-ik′ū-lar, adj. needle-shaped; slender and sharp-pointed.