isolead

isolead

(ˈaɪsəˌliːd)
n
a curved line on a ballistic graph that is used to calculate the trajectory required in order to hit a moving target
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014