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n. - A bacterial poison that has been weakened until it is no longer poisonous but is strong enough to induce the formation of antibodies and immunity to the specific disease caused by the poison.

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Usage examples (5)
  • Another round of tests released today again found microcystin, a liver toxin, and a neurotoxin called anatoxin-a.
  • Another round of tests released yesterday again found microcystin, a liver toxin, and a neurotoxin called anatoxin-a.
  • Algal toxins arising from the blooms include microcystin, anatoxin-a, cylindrospermopsin and saxitoxin, according to the Ohio Department of Health.
  • "Because microcystin levels fluctuate, (and) still exceed the WHO recommendations, and anatoxin-a is above non-detect, the state of Ohio is maintaining the advisory...
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