The line that separates the top number (numerator) from the bottom number (denominator) of a fraction can be called a dividing line - since this is what is happening in the sum itself to calculate the fraction.
It is the solidus line that separates the numerator from the denominator in a fraction.
To bisect is to cut or divide into halves. A bisecting line would then be a line that divides another line in half or a line that divides an angle in half.
This is the denominator, which is the bottom line of the fraction.
It's sometimes known as the 'divison bar' or 'fraction bar'.
To divide
It is a vinculum
The Vinculum, in some countries, is the name given to the horizontal line used to separate the numerator and denominator in a fraction.
a fraction bar By Hoggyilove animals: A vinculum is what it's called
fraction bar
The line that separates the top number (numerator) from the bottom number (denominator) of a fraction can be called a dividing line - since this is what is happening in the sum itself to calculate the fraction.
The imaginary line that divides the Earth into two halves is called the Equator.
If it's a fraction then it's the denominator which divides into the numerator
the equator
A chord.
Equator
The imaginary line that divides Earth into the Northern and Southern Hemispheres is called the equator.