菊きく石いし

noun

ammonite (traditional name)

Traditional Japanese name for ammonite fossils, often used in paleontology or fossil collecting contexts. The modern scientific term is アンモナイト.

• この地ち域いきでは菊きく石いしの化か石せきがよく見みつかる。

  Ammonite fossils are often found in this area.