n.

a horizontal bar that goes across something

game equipment consisting of a horizontal bar to be jumped or vaulted over

long thin horizontal crosspiece between two vertical posts

Formation of nanofiber crossbars in electrospinning
CMOS-like logic in defective, nanoscale crossbars
Practical algorithms for performance guarantees in buffered crossbars
Using Sparse Crossbars within LUT Clusters
Design and analysis of buffered crossbars and banyans with cut-through switching
Algorithms for providing bandwidth and delay guarantees in input-buffered crossbars with speedup
Generating Highly-Routable Sparse Crossbars for PLDs
Aligned graphene nanoribbons and crossbars from unzipped carbon nanotubes
Algorithms for providing bandwidth and delay guarantees in input-buffered crossbars with speedup
Fundamental analysis of resistive nano-crossbars for the use in hybrid Nano/CMOS-memory