WordWeb Online

1. A luminance unit equal to 1 candle per square meter measured perpendicular to the rays from the source
    
2. Egg or young of an insect parasitic on mammals especially a sucking louse; often attached to a hair or item of clothing
    
3. [Brit] A person who lacks good judgment
   - fool, sap, muggins [Brit], tomfool, meathead, jughead [N. Amer], drongo [Austral, NZ], donkey, moegoe [S.Africa], galah [Austral], boofhead [Austral], charlie [Brit], mampara [S.Africa], juggins [Brit]

Sounds like:

Derived forms: nits

Type of: egg, luminance unit, simple, simpleton

Encyclopedia: Nit