1. Egg or young of an insect parasitic on mammals especially a sucking louse; often attached to a hair or item of clothing
   "The school nurse checked children's hair for nits"
    
2. [Brit, informal] A person who lacks good judgment
   "Don't be such a nit; think before you act";
   - fool, sap [N. Amer, informal], muggins [Brit, informal], tomfool, meathead [informal], jughead [N. Amer, informal], mampara [S.Africa, informal], dill [Austral, NZ, informal], boofhead [Austral, informal], moegoe [S.Africa, informal], galah [Austral, informal], charlie [Brit, informal], diddy [Brit, informal], drongo [Austral, NZ, informal], juggins [Brit, informal]
    
3. A luminance unit equal to 1 candle per square meter measured perpendicular to the rays from the source
   "The new OLED display boasted a peak brightness of 1000 nits"

Sounds like:

Derived forms: nits

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

Encyclopedia: Nit, nagaland