NOUN (2)

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;

The Collaborative International Dictionary of English v.0.48:

Nit \Nit\ (n[i^]t), n. [AS. hnitu; akin to D. neet, G. niss,
   OHG. niz; cf. Gr. koni`s, koni`dos, Icel. gnit, Sw. gnet,
   Dan. gnid, Russ. & Pol. gnida, Bohem. hnida, W. nedd.]
   (Zool.)
   The egg of a louse or other small insect.
   [1913 Webster]

   Nit grass (Bot.), a pretty annual European grass
      (Gastridium lendigerum), with small spikelets somewhat
      resembling a nit. It is also found in California and
      Chile.
      [1913 Webster]

WordNet (r) 3.0 (2006):

nit
    n 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

Moby Thesaurus II by Grady Ward, 1.0:

61 Moby Thesaurus words for "nit":
   adverse criticism, animadversion, aspersion, bad notices,
   bad press, captiousness, carping, cat flea, cavil, caviling,
   censoriousness, chigoe, cockroach, crab, criticism, dog flea,
   exception, faultfinding, flak, flea, grayback, hairsplitting, hit,
   home thrust, hostile criticism, hypercriticalness, hypercriticism,
   imputation, jigger, knock, louse, mite, nagging, nay, niggle,
   niggling, nit-picking, nix, no, nope, obloquy, overcriticalness,
   parasite, pestering, pettifogging, priggishness, quibble,
   quibbling, rap, red bug, reflection, reproachfulness, roach,
   sand flea, slam, stricture, swipe, taking exception,
   trichoschistism, vermin, weevil



V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

NIT
       Network Information Tabel (DVB)