单词：merostomata
[医]肢口纲
n. pl. 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.
includes the trilobites, Eurypteroidea, and Limuloidea. All are extinct
except the horseshoe crabs of the last group. See Limulus.
词型变化：名词复数形式 : merostomatas