See Also: double concave lens(medicine)
concave lens(medicine)
double convex lens(medicine)
nigger(2)(dictionary)
nigger(1)(dictionary)
nigger(dictionary)
Concave(money)
concave(2)(dictionary)
concave(dictionary)
Concave(medicine)

nigger(2) (iou) and double concave lens (medicine)


nigger(2) (iou)



nigger verb trans. US. Now rare. M19.
[from NIGGER adjective & noun.]
Burn or char off a length or lengths of (a log etc.). Usu. foll. by off. M19.
With it as obj. Work very hard. M19.

double concave lens (medicine)


double concave lens -->
biconcave lens


A lens that is concave on two opposing surfaces.

Synonym: concavoconcave lens, double concave lens.