The Collaborative International Dictionary of English v.0.48:

Fecundity \Fe*cun"di*ty\, n. [L. fecunditas: cf. F.
   f['e]condit['e]. See Fecund.]
   1. The quality or power of producing fruit; fruitfulness;
      especially (Biol.), the quality in female organisms of
      reproducing rapidly and in great numbers.
      [1913 Webster]

   2. The power of germinating; as in seeds.
      [1913 Webster]

   3. The power of bringing forth in abundance; fertility;
      richness of invention; as, the fecundity of God's creative
      power. --Bentley.
      [1913 Webster]

WordNet (r) 3.0 (2006):

fecundity
    n 1: the intellectual productivity of a creative imagination
         [syn: fecundity, fruitfulness]
    2: the state of being fertile; capable of producing offspring
       [syn: fertility, fecundity] [ant: infertility,
       sterility]
    3: the quality of something that causes or assists healthy
       growth [syn: fruitfulness, fecundity] [ant: aridity,
       barrenness, fruitlessness]