Leth"al (lĕth"ăl), n.
[Lauric + ether + alcohol.] (Chem.)
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.
Le"thal (lē"thal), a. [L.
lethalis, letalis, fr. lethum, letum,
death: cf. F. léthal.] Deadly; mortal;
fatal. "The lethal blow." W. Richardson. --