segment
n. countablen. one of the parts that something is naturally divided into. You can use it to talk about a piece of a fruit, a part of a circle, or a group of customers.
n. one of several parts or sections into which an object or entity is divided. Often refers to a distinct portion of a geometric figure, a biological organism, or a market demographic.
She divided the orange into small segments.
The marketing team is focusing on the youth segment of the population this year.
In geometry, a line segment is defined as the part of a line that connects two distinct endpoints, containing every point on the line between them.
From Latin segmentum (“a piece cut off, a strip, segment of the earth, a strip of tinsel”), from secāre (“to cut”).
Commonly paired with 'of' to specify the whole being divided, such as 'a segment of the market' or 'a segment of the population'.