from the GNU version of the Collaborative International Dictionary of English
- n.pl. Originally, an artificial group including many parasitic Entomostraca, together with the horseshoe crabs (Limuloidea).
- n.pl. By some recent writers applied to the Merostomata.
from The Century Dictionary and Cyclopedia
- In Latreille's system of classification, the second order of his Entomostraca, divided into two families, Xiphosura and Siphonosloma.
Sorry, no etymologies found.