• Webster's Revised Unabridged Dictionary
    • a Graptolitic Of or pertaining to graptolites; containing graptolites; as, a graptolitic slate.
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Century Dictionary and Cyclopedia
    • graptolitic Of or belonging to graptolites; produced by graptolites; containing graptolites: as, graptolitic markings; graptolitic slate. Also graptolite, graptolithic.
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In literature:

A genus of Graptolites.
"The Ancient Life History of the Earth" by Henry Alleyne Nicholson
For there is not any representation to-day of such races as Graptolites and Trilobites.
"The Outline of Science, Vol. 1 (of 4)" by J. Arthur Thomson
The strata consist of greywackes, flags and shales with seams and zones of graptolite shale which yield fossils sparingly.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1" by Various
These consist of greywackes, flags and shales with bands of dark graptolite shales, the finer sediments being often well cleaved.
"Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 8" by Various
These Graptolites are specially characteristic of the Upper Cambrian and Lower Silurian.
"The Chain of Life in Geological Time" by Sir J. William Dawson
He described also the graptolites of the local Silurian strata; and the flora of the Coal-formation of Altai and Nebraska.
"Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5" by Various
In the Silurian system, for example, the graptolites have been shown by C. Lapworth to furnish a useful basis for zonal subdivisions.
"Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6" by Various
The Graptolite polyparies vary considerably in size: the majority range from 1 in.
"Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3" by Various
A typical graptolite consists of an axis bearing a series of tooth-like projections, like a saw.
"Encyclopaedia Britannica, 11th Edition, Volume 14, Slice 2" by Various
Graptolites occur but rarely in the Upper Cambrian.
"The Elements of Geology" by William Harmon Norton