Webster’s Revised Unabridged Dictionary · 1913
Arthrogastra
Ar′thro·gas′tra, n. pl. [NL., fr. Gr. ἄρθρον joint + γαστήρ stomach.] (Zoöl.) A division of the Arachnida, having the abdomen annulated, including the scorpions, harvestmen, etc.; pedipalpi.