tending to increase velocity

Relating to acceleration; adding to velocity; quickening.

Quickening.

That has tens motion.

Tending to accelerate. acceleratory.

Acceleration.

A moment's consideration shows that such progressive activity denotes an accelerative attitude on the part of the organism towards the transfer of energy into the organic material system. – The Birth-Time of the World and Other Scientific Essays by J. (John) Joly

The one principle- the accelerative law which is the law of the organic- urges all alike onward to development, reproduction and death. – The Birth-Time of the World and Other Scientific Essays by J. (John) Joly