ray
A line.
Line
Straight means starting from one point and goes in same path and join at end point
A line.
A line.
If you mean a straight path, rather than a strait path, then it is a ray.
a ray
it is called a ray
A line
The immediate surroundings of any point on a curved path can be considered as part of a circle: the circle of curvature at that point. Then the tangent to the path at that point is a line that meets the path at only one point in that neighbourhood and which is perpendicular to the line joining the point to the centre of the circle or curvature. The concept can be extended to straight segments of the path by assuming that the centre of curvature is at an infinite distance. In that case, the path and its tangent are the same line.
The path of a moving point is the trajectory or route that the point follows as it travels through space or along a surface. The path can be straight, curved, circular, or any other shape, depending on the motion of the point. It is typically described by its position coordinates as a function of time.
The term you are describing is a line.