1
a
: the quality or the power of producing fruit especially in abundance : fruitfulness
the fecundity of the earth
b
: productive quality or power
the fecundity of the pocket-book publishers—
James Rorty
c
: richness of imagination or invention
the fecundity of Shakespeare's genius
2
a
: the power of producing offspring especially in large numbers or the quality that conduces to this : the potential reproductive capacity (as of a hen) as measured by the individual production of mature eggs and sperm
b
: the power of germinating (as in seeds)
c
: the power or quality of increasing rapidly in number or quantity or of being so increased in number or quantity
3
archaic
: the power of making fruitful or fertile
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Merriam-Webster unabridged
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