polymerosomata

from The Century Dictionary.

• In Leach's system of classification, an order of pulmonate Arachnida, synonymous with Latreille's Pedipalpi, containing the scorpions and their allies, as the Thelyphonidæ and Phrynidæ: so called from the numerous flexible segments of the body, and contrasted with Dimerosomata, Monomerosomata, and Podosomata.