Citigradae

from The Collaborative International Dictionary of English v.0.48
Citigradae \Cit`i*gra"d[ae]\, n. pl. [NL., fr. L. citus swift
   (p. p. of cire, ciere, to move) + gradi to walk. See {Cite}.]
   (Zool.)
   A suborder of Arachnoidea, including the European tarantula
   and the wolf spiders ({Lycosidae}) and their allies, which
   capture their prey by rapidly running and jumping. See {Wolf
   spider}.
   [1913 Webster]
    

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