| 单词 | graptolite |
| 释义 | graptolite —graptolitic /grap'teuh lit"ik/, adj. /grap"teuh luyt'/, n. any colonial animal of the extinct class Graptolithina, most common in the Ordovician and Silurian Periods, thought to be related to the pterobranchs. [1830-40; < Gk graptó(s) painted, marked with letters (v. adj. from gráphein to write) + -LITE] |
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