nit 1
/nit/ , n.
1. the egg of a parasitic insect, esp. of a louse, often attached to a hair or a fiber of clothing.
2. the young of such an insect.
[ bef. 900; ME nite, OE hnitu, c. D neet, G Niss, Norw nit ]
nit 2
/nit/ , n. Physics.
a unit of luminous intensity equal to one candela per square meter. Abbr.: nt
[ 1950-55; extracted from L nitor brightness; see NITID, -OR 1 ]
nit 3
/nit/ , n. Chiefly Brit.
a nitwit.
[ by shortening ]