graptolites
📖 中文释义
- (graptolite 的复数) n.[古生]笔石( 古元脊椎动物, 现存化石 )
🧩 词形变化
原形 graptolite
📘 English Definition（英文释义）
- plural of graptolite
- n. One of numerous species of slender and delicate
- fossils, of the genus Graptolites and allied genera, found in the
- Silurian rocks. They belong to an extinct group (Graptolithina)
- supposed to be hydroids.