👉 Apothegm is a term used in physics and chemistry to describe an object that appears to be at rest when viewed from a distance. It is named after the Greek philosopher and scientist, Apollonius of Perga. The apothegm is defined as an imaginary line or curve which seems to intersect the two ends of a length measurement such as a diameter, radius, or circumference. In physics, it's used in finding the volume of a sphere when given its diameter or