crossover

noun

• 1a point or place of crossing from one side to the other.
• a short length of track joining two adjacent railroad lines.

• 2the process of achieving success in a different field or style, especially in popular music: [as modifier]:a jazz-classical crossover album

• 3a person who votes for a candidate in a different political party than the one they usually support: [as modifier]:crossover votes

• 4 [as modifier] relating to or denoting trials of medical treatment in which experimental subjects and control groups are exchanged after a set period:a crossover study