Pseudoscorpiones \Pseu`do*scor`pi*o"nes\, n. pl. [NL. See Pseudo-, and Scorpion.]

(Zo["o]l.) An order of Arachnoidea having the palpi terminated by large claws, as in the scorpions, but destitute of a caudal sting; the false scorpions. Called also Pseudoscorpii, and Pseudoscorpionina. See Illust. of Book scorpion, under Book.

Source: Webster's Revised Unabridged Dictionary (1913)