centreline

Example:The aircraft's axis is its main rotational axis, around which it can pitch, roll, and yaw.

Definition:An imaginary line about which a body, such as an aircraft or ship, rotates or is believed to rotate.

Example:The centerline was marked on the floor to guide the placement of machinery during the construction process.

Definition:The line running through the center of something, often used in technical and architectural contexts.

Example:The midline of the building provided a clear reference for the construction team.

Definition:The line that runs from a point that is midway between extremes, such as the line running through the middle of a body or object.