That is a vinculum.
divider
The line between the numerator and the denominator of a fraction is the the solidus line
fractor
There is no special name for such a numerator.
The top number is called the numerator and the bottom number called the denominator. The line that usually separates the numerator and denominator. If slanting it is called a solidus or forward slash, for example 3⁄4. If the line is horizontal, it is called a vinculum or, informally, a "fraction bar"
divider
The line between the numerator and the denominator of a fraction is the the solidus line
Vinculum is the name of the line between the numerator and the denominator.
The bar or line that separates the numerator from the denominator in fractions is known as the solidus.
It's sometimes known as the 'divison bar' or 'fraction bar'.
It is the solidus line that separates the numerator from the denominator in a fraction.
fractor
"The numerator and denominator are known as the fraction bar.”
the line is called a division bar
If the numerator is written above the denominator, the line is called the "bar". If the fraction is written in-line like 1/2, the line is called a "virgule".
Another name for a denominator is a divisor.
The numerator is 5.The denominator is 9.