pneumoskeleton
Pneu`mo*skel"e*ton, n. Etym: [Pneumo- + skeleton.] (Zoöl.) Defn: A chitinous structure which supports the gill in some invertebrates.
Pneu`mo*skel"e*ton, n. Etym: [Pneumo- + skeleton.] (Zoöl.) Defn: A chitinous structure which supports the gill in some invertebrates.