ergotism

/ER1 G AH0 T IH0 Z AH0 M/
noun
  1. 1

    The effect of long-term ergot poisoning, traditionally due to the ingestion of the alkaloids produced by the Claviceps purpurea fungus which infects rye and other cereals, and more recently by the action of a number of ergoline-based drugs.

noun
  1. 1

    A logical deduction.

Source: https://en.wiktionary.org/wiki/ergotism