'Bladder worm' definitions:

Definition of 'bladder worm'

noun

Encysted saclike larva of the tapeworm

From: GCIDE

Bladder \Blad"der\ (bl[a^]d"d[~e]r), n. [OE. bladder, bleddre, AS. bl[=ae]dre, bl[=ae]ddre; akin to Icel. bla[eth]ra, SW. bl[aum]ddra, Dan. bl[ae]re, D. blaar, OHG. bl[=a]tara the bladder in the body of animals, G. blatter blister, bustule; all fr. the same root as AS. bl[=a]wan, E. blow, to puff. See Blow to puff.] [1913 Webster]
1. (Anat.) A bag or sac in animals, which serves as the receptacle of some fluid; as, the urinary bladder; the gall bladder; -- applied especially to the urinary bladder, either within the animal, or when taken out and inflated with air. [1913 Webster]
2. Any vesicle or blister, especially if filled with air, or a thin, watery fluid. [1913 Webster]
3. (Bot.) A distended, membranaceous pericarp. [1913 Webster]
4. Anything inflated, empty, or unsound. "To swim with bladders of philosophy." --Rochester. [1913 Webster]
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 (Zool.), the larva of any species of tapeworm (T[ae]nia), 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 Fucus vesiculosus) -- called also bladder tangle. See Wrack. [1913 Webster]

From: GCIDE

Cysticerce \Cys"ti*cerce\ (s?s"t?-s?rs), Cysticercus \Cys`ti*cer"cus\ (-s?r"k?s), n. [NL. cysticercus, fr. Gr. ???? bladder + ke`rkos tail: cf. F. cysticerque.] (Zool.) The larval form of a tapeworm, having the head and neck of a tapeworm attached to a saclike body filled with fluid; -- called also bladder worm, hydatid, and measle (as, pork measle). [1913 Webster]
Note: These larvae live in the tissues of various living animals, and, when swallowed by a suitable carnivorous animal, develop into adult tapeworms in the intestine. See Measles, 4, Tapeworm. [1913 Webster]