SKIP TO CONTENT

nit

A nit is a louse egg. If your scalp is extra itchy, get someone (maybe even a "nitpicker" to check you for nits.

There's no getting around the fact that nits are pretty gross — they're basically baby lice. Nits can be tricky to spot on an infested person's scalp, because they're smaller than a grain of rice and a very pale color. Colloquially, to "nit pick" is to find and criticize someone's faults, no matter how tiny they might be. Another, less disgusting kind of nit is a scientific term for an amount of light emitted.

Definitions of nit
  1. noun
    egg or young of an insect parasitic on mammals especially a sucking louse; often attached to a hair or item of clothing
    see moresee less
    type of:
    egg
    animal reproductive body consisting of an ovum or embryo together with nutritive and protective envelopes; especially the thin-shelled reproductive body laid by e.g. female birds
  2. noun
    a luminance unit equal to 1 candle per square meter measured perpendicular to the rays from the source
    see moresee less
    type of:
    luminance unit
    a measure of luminance
Word Family
EDITOR’S CHOICE

Test prep from the experts

Boost your test score with programs developed by Vocabulary.com’s experts.

  • Proven methods: Learn faster, remember longer with our scientific approach.
  • Personalized plan: We customize your experience to maximize your learning.
  • Strategic studying: Focus on the words that are most crucial for success.

SAT/PSAT

$29.95
  • Number of words: 500+
  • Duration: 8 weeks or less
  • Time: 1 hour / week

TOEFL

$29.95
  • Number of words: 500+
  • Duration: 10 weeks or less
  • Time: 1 hour / week

ACT

$29.95
  • Number of words: 700+
  • Duration: 10 weeks
  • Time: 1 hour / week