Noun class merostomata has 1 sense
  1. Merostomata, class Merostomata - used in some classifications; includes the orders Xiphosura and Eurypterida
    --1 is a kind of arthropod
    --1 is a member of Chelicerata, superclass Chelicerata
    --1 has members: Xiphosura, order Xiphosura; Eurypterida, order Eurypterida
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