4. Anything inflated, empty, or unsound. "To swim with bladders of philosophy." Rochester.
Bladder nut, or Bladder tree (Bot.), a genus of plants (Staphylea) with bladderlike seed pods. -- Bladder pod (Bot.), a genus of low herbs (Vesicaria) with inflated seed pods. -- Bladdor senna (Bot.), a genus of shrubs (Colutea), with membranaceous, inflated pods. -- Bladder worm (Zoöl.), the larva of any species of tapeworm (Tænia), found in the flesh or other parts of animals. See Measle, Cysticercus. -- Bladder wrack (Bot.), the common black rock weed of the seacoast (Fucus nodosus and F. vesiculosus) -- called also bladder tangle. See Wrack.
Blad"der, v. t. [imp. & p. p. Bladdered (&?;); p. pr. & vb. n. Bladdering.] 1. To swell out like a bladder with air; to inflate. [Obs.] G. Fletcher.