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/ˈɡɹaptəlʌɪt/ · noun
Any of a group of extinct aquatic colonial invertebrates, of the class Graptolithina, from the Cambrian and Carboniferous periods..
The samples were black shale, and on the shales were some ancient fossils called graptolites.
Use graptolite when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Graptolite means Any of a group of extinct aquatic colonial invertebrates, of the class Graptolithina, from the Cambrian and Carboniferous periods..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
The samples were black shale, and on the shales were some ancient fossils called graptolites.
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