divider

noun
1
a thing that divides something
جداکننده, تقسیم‌کننده, حایل
2
an instrument made of two long thin metal parts joined together at the top, used for measuring lines and angles
پرگار
a pair of dividers
3
an issue on which people disagree
مسئله‌ی اختلاف برانگیز, موضوع مناقشه
On the Labour side, the big divider was still nuclear weapons.