an·gus·ti·sel·late
Definition of angustisellate
paleontology
: having sutures in which there are a prominent ventral saddle, deep lateral lobes, and deep umbilical saddles
—used of a stage in the development of the ammonoid shell
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Merriam-Webster unabridged
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Time Traveler for angustisellate
The first known use of angustisellate was in 1884
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