The Collaborative International Dictionary of English v.0.48:

Chalcidian \Chal*cid"i*an\, n. [L. chalcis a lizard, Gr.
   chalki`s.] (Zool.)
   One of a tropical family of snakelike lizards
   (Chalcid[ae]), having four small or rudimentary legs.
   [1913 Webster]