In a word, they hold that a state of ease and affluence is the great promoter of prolificness.
Domestication, as a general rule, increases the prolificness of animals and plants.
Then the doctor went on to speak of the prolificness of wretchedness, the swarming of the lower classes.
The number of well-defined dugs is always the best prima facie evidence of prolificness in any animal.
That he may increase beyond the prolificness of the white-necked crow and cover the ground after the fashion of the binding grass.
The (p. 325) moth, whose egg produces these larv, is a large white miller of unusual size and prolificness.
1640s, from French prolifique (16c.), from Medieval Latin prolificus, from Latin proles "offspring" + root of facere "to make" (see factitious). Latin proles is contracted from *pro-oles, from PIE *pro-al-, from *pro- "forth" (see pro-) + *al- "to grow, nourish" (see old). Related: Prolifical (c.1600).
Prolific is in common use, but to make a satisfactory noun from it has passed the wit of man. [Fowler]