WordWeb Online

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

Sounds like:

Derived forms: nits

Type of: egg, luminance unit, simple [archaic], simpleton

Encyclopedia: Nit, nagaland