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Webster's Dictionary (1865)

Se-rōs'i-ty, n.

noun

n. [Fr. sérosité, Sp. serosidad, It. serosità. See SEROUS.]

  1. The thin, watery liquid forming the chief constituent of most animal fluids, as of blood, milk, and the like; serum.
  2. A fluid which exudes from the albumen of the serum of the blood when coagulated by heat. Dunglison. Ure.