acicular vs aciculate

acicular

adj
  • Having sharp points like needles. 

  • Of a leaf, slender and pointed, needle-like. 

  • Needle-shaped; slender like a needle or bristle. 

aciculate

adj
  • Marked with fine irregular streaks as if scratched by a needle. 

  • Furnished with aciculae. 

  • acicular (needle-shaped) 

How often have the words acicular and aciculate occurred in a corpus of books? (source: Google Ngram Viewer )