Yes, Zac Brown is indeed the lead singer of the Zac Brown band.
Crossover definition, a bridge or other structure for crossing over a river, highway, etc. See more.
Crossover experiment (chemistry) In chemistry, a crossover experiment is a method used to study the mechanism of a chemical reaction. In a crossover experiment, two similar but distinguishable reactants simultaneously undergo a reaction as part of the same reaction mixture. The products formed will either correspond directly to one of the two reactants (non-crossover products) or will include components of both reactants (crossover products).