1An effect due to or dependent on mass or combined number; a total or grand effect.
2Chiefly Metallurgy, the effect of size and shape in causing different rates of cooling, and so varying physical properties, in different parts of an object after heating.
Origin
Early 20th century.
Definition of mass effect in US English:
mass effect
noun
1An effect due to or dependent on mass or combined number; a total or grand effect.
2Chiefly Metallurgy, the effect of size and shape in causing different rates of cooling, and so varying physical properties, in different parts of an object after heating.