Merostomata
Pronunciation : Mer`o*stom"a*ta
Part of Speech : n.
Etymology : [NL., fr. Gr. (Zo?l.)
Definition : Defn: A class of Arthropoda, allied to the Crustacea. It includes the trilobites, Eurypteroidea, and Limuloidea. All are extinct except the horseshoe crabs of the last group. See Limulus.
pl.
Source : Webster's Unabridged Dictionary, 1913