Chelicerata
plural nounDefinition of Chelicerata
: a subphylum or other division of the phylum Arthropoda comprising forms having chelicerae and lacking antennae and including the horseshoe crabs and eurypterids, spiders, scorpions, and sea spiders
A fossil eurypterid, representing the Chelicerata.— Stephen Jay Gould, Wonderful Life, 1989
— see arachnida , merostomata , pycnogonida
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Merriam-Webster unabridged
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Time Traveler for Chelicerata
The first known use of Chelicerata was in 1919
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