CYANU′′RIC ACID. H3C3N3O3. Syn. Pyro-u′′ric acid†. A peculiar acid, discovered by Scheele. It is a product of the decomposition of the soluble cyanates by dilute acids, or of urea by heat, &c.
CY′DER. See Cider.
CY′DONINE. The peculiar gum of quince seed. It resembles bassorin in most of its properties.
CY′MIDINE. An oily base, homologous with aniline, obtained by the action of iron filings and acetic acid on nitro-cymol.
CY′MOL. A peculiar hydrocarbon found in oil of cumin, in admixture with cuminol. The two bodies are separable in a great measure by distillation, cymol being the most volatile portion of the oil.
CYNAPINE. An alkaloid obtained from Æthusa cynapium, or fool’s parsley. It possesses no practical interest.
CYSTICERCI. These parasites are embryo tænia or tapeworm, infesting the bodies of men and different animals. One variety of the cysticerci has its habitat in the organisms of men, pigs, oxen, horses, camels, sheep, and roe-deer; another in the muscles and internal organs of cattle; a third is found in cattle, sheep, horses, the reindeer, squirrels, certain kinds of monkeys, and occasionally in man; whilst a fourth—the Cystercus cellulosæ—is more especially met with in measly pork. Professor Gamgee believes that probably 5 per cent. of the pigs in Ireland are affected with this last cystercus.
The following figure represents a piece of
measly pork infested with cysticerci. Professor Leuckart seems to have shown pretty conclusively that man may become infested with a certain form of tapeworm by partaking of imperfectly cooked veal or beef, infested with the second variety of the parasite.
