Noah Webster
Prolifical
PROLIF'ICAL, adjective [Latin proles, offspring, and facio, to make.]
1. Producing young or fruit; fruitful; generative; productive; applied to animals and plants; as a prolific female; a prolific tree.
2. Productive; having the quality of generating; as a controversy prolific of evil consequences; a prolific brain.
3. A prolific flower, [prolifer, ] in botany is one which produces a second flower from its own substance, or which has smaller flowers growing out of the principal one. But proliferous is commonly used.