Search Result for "reverse lightning":
Wordnet 3.0

NOUN (1)

1. atmospheric discharges (lasting 10 msec) bursting from the tops of giant storm clouds in blue cones that widen as they flash upward;
[syn: jet, blue jet, reverse lightning]



WordNet (r) 3.0 (2006):

reverse lightning
    n 1: atmospheric discharges (lasting 10 msec) bursting from the
         tops of giant storm clouds in blue cones that widen as they
         flash upward [syn: jet, blue jet, reverse lightning]