graptolite

n. [古生]笔石( 古元脊椎动物, 现存化石 )

发音

UK /ˈɡɹaptəlʌɪt/

词形变化

graptolites 复数 graptolites

释义与例句

n.
  1. 1.

    Any of a group of extinct aquatic colonial invertebrates, of the class Graptolithina, from the Cambrian and Carboniferous periods.

词源

From Ancient Greek γραπτός (graptós, “painted, marked with letters”) + -lite.

来源：wiktionary