graptolite

== English == === Etymology === From Ancient Greek γραπτός (graptós, “painted, marked with letters”) +‎ -lite. === Pronunciation === (UK) IPA(key): /ˈɡɹaptəlʌɪt/ === Noun === graptolite (plural graptolites) Any of a group of extinct aquatic colonial invertebrates, of the class Graptolithina, from the Cambrian and Carboniferous periods. ==== Derived terms ==== graptolitic ==== See also ==== sicula prosicula rhabdosome