The phrase "exponential phase" refers to a period of rapid growth or increase that gets faster and faster over time. It is like when something starts small but grows so quickly that it becomes much larger or more significant. Full definition
This provided estimates of the adult maximum body weight achieved (a), the growth rate (1 / b) during the early exponential phase, and the time taken to reach 50 % maximum body weight (x0). (academic.oup.com)
With the contributions that you are able to make, I am sure that the exponential phase of the curve should be there soon. (retire29.com)
Your baby needs all the calories you can give in this exponential phase of her growth. (electricbreastpumpwomen.com)