x-row, n. — Green’s Dictionary of Slang

x-row n.

[fig. use of x as ‘nameless’, or the inmates are the ex-living, i.e. looking forward only to execution; note also ex v.]

(US prison) the condemned cells.

1992

Bentley & Corbett Prison Sl. 8: X-Row The death row area of the prison. (Archaic: C.C.’s).