quickening
1. [ noun ] (biology) the process of showing signs of life
Examples:

"the quickening of seed that will become ripe grain"

Related terms: organic_process
2. [ noun ] the stage of pregnancy at which the mother first feels movements of the fetus
Related terms: degree pregnancy
3. [ noun ] the act of accelerating; increasing the speed
Synonyms: acceleration speedup
Related terms: speed accelerate accelerate