Center of gravity and Midpoint

Center of gravity noun - The point within something at which gravity can be considered to act; in uniform gravity it is equal to the center of mass.

Midpoint and center of gravity are semantically related. In some cases you can use "Midpoint" instead a noun phrase "Center of gravity".

Midpoint noun - A middle point between extremes.

Center of gravity and midpoint are semantically related. Sometimes you can replace phrase "Center of gravity" with "Midpoint", this terms are similar.