shaped like a needle.
  1. (of cast iron) containing ferrite in a needlelike form.
  2. (of an alloy) having a microstructure of needlelike components.

Origin of acicular

First recorded in 1785–95; acicul(a) + -ar1
Related formsa·cic·u·lar·i·ty [uh-sik-yuh-lar-i-tee] /əˌsɪk yəˈlær ɪ ti/, nouna·cic·u·lar·ly, adverb Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for acicular

acuminate, acute, mucronate, pointy, sharp, acerate, acerose, acerous

Examples from the Web for acicular

Historical Examples of acicular