Lethal Definition

lēthəl
adjective
Causing or capable of causing death; fatal or deadly.
Webster's New World
Extremely harmful; devastating.
Accusations lethal to the candidate's image.
American Heritage
noun

(chemistry) One of the higher alcohols of the paraffine series obtained from spermaceti as a white crystalline solid.

Wiktionary

Origin of Lethal

  • From Latin lÄ“tālis (“mortal, deadly"), improperly written lethalis, from letum (“death"), improperly written as lethum, as associated with Greek λήθη (lethe, “forgetfulness").

    From Wiktionary

  • Late Latin lēthālis alteration (probably influenced by Lēthē Lethe) of Latin lētālis from lētum death

    From American Heritage Dictionary of the English Language, 5th Edition

  • Abbreviation of “lauric acid ethereal salt", so called because it occurs in the ethereal salt of lauric acid.

    From Wiktionary

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