- half-wave plate,
- half-wave rectifier,
Origin of half-wit
Examples from the Web for half-wit
Naomi Watts plays Diana as a sweet-natured, wistful, half-wit.Princess Diana Was the Girlfriend From Hell. Why Is This Movie So Boring?|Tina Brown|November 4, 2013|DAILY BEAST
For the instant he partially suspected mischief and wheeled about, but one look at the half-wit dissipated all doubt.Sunlight Patch|Credo Fitch Harris
"For the family," was Cleena's watchword, and it had already become the half-wit's.
For even if one calls him a half-wit, it still makes a difference that he keeps the right half of his wits.Appreciations and Criticisms of the Works of Charles Dickens|G. K. Chesterton
1670s, originally "a would-be wit whose abilities are mediocre;" sense of "simpleton" (one lacking all his wits) is first attested 1755.
Half-wits are fleas; so little and so light,
We scarce could know they live, but that they bite.
[Dryden, "All for Love"]
Phrase out of half wit "half out of one's mind" was in Middle English (late 14c.). Half-witted "lacking common sense" is from 1640s.