noun
evolutionary rate; rate of evolution
Technical term used in biology and related fields to describe the speed at which evolutionary change occurs.
この種の進化速度は非常に遅い。
The evolutionary rate of this species is very slow.
進化速度は環境の変化に影響される。
The rate of evolution is influenced by environmental changes.
Compound of 進化 (しんか, 'evolution') and 速度 (そくど, 'speed'). The word is a straightforward technical term with no irregular historical derivation.