# Straight Line

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## straight line

[′strāt ¦līn] (botany)

## Straight Line

a fundamental concept of geometry. In the systematic formulation of geometry, the straight line is usually taken as one of the initial concepts, which can be defined only indirectly by the axioms of geometry. If the concept of distance between points in space is used as the basis for the construction of a geometric system, the straight line can be defined as the curve along which the distance between two points is smallest.