from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Capable of causing death.
- adj. Of, relating to, or causing death. See Synonyms at fatal.
- adj. Extremely harmful; devastating: accusations lethal to the candidate's image.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. deadly; mortal; fatal
- n. One of the higher alcohols of the paraffine series obtained from spermaceti as a white crystalline solid.
from the GNU version of the Collaborative International Dictionary of English
- n. One of the higher alcohols of the paraffine series obtained from spermaceti as a white crystalline solid. It is so called because it occurs in the ethereal salt of lauric acid.
- adj. Deadly; mortal; fatal.
from The Century Dictionary and Cyclopedia
- Pertaining to or capable of causing death; deadly; fatal.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. of an instrument of certain death
Late Latin lēthālis, alteration (probably influenced by Lēthē, Lethe) of Latin lētālis, from lētum, death.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin lētālis ("mortal, deadly"), improperly written lethalis, from letum ("death"), improperly written as lethum, as associated with Greek λήθη (lethe, "forgetfulness"). (Wiktionary)
Abbreviation of “lauric acid ethereal salt”, so called because it occurs in the ethereal salt of lauric acid. (Wiktionary)