grap.to.lite

graptolite的音标和读音：
DJ音标发音： [ˈgræptəˌlait]
KK音标发音： [ˈgræptəˌlaɪt]

graptolite的词性：
n.（名词）

1. Any of numerous extinct colonial marine animals chiefly of the orders Dendroidea and Graptoloidea of the late Cambrian to the early Mississippian periods, whose fossil remains are often used to date the rocks of the Silurian and Ordovician ages.
笔石动物：许多已绝灭的殖民地海洋生物中的任何一种，主要为寒武纪晚期到密西西比纪早期的树形笔石目及笔石纲的生物， 其化石残存物常用于确定志留纪和奥陶纪岩石的年代

graptolite的词源：

2. Greek graptos [written] from graphein [to write] * see graphic
希腊语 graptos [写的] 源自 graphein [写] *参见 graphic

3. -lite [from the resemblance of the fossils' impressions on shale to markings on a slate]
-lite [因化石在页岩上的印记类似于在条石上的标记而得名]