[1] : The Collaborative International Dictionary of English v.0.48

procreation \pro`crea"tion\, n. f. procr'eation, l,
   procreatio.
   the act of begetting; generation and production of young.
   --south.
   1913 webster

[2] : WordNet (r) 2.0

procreation
     n : the sexual activity of conceiving and bearing offspring
         syn: reproduction, breeding, facts of life
see also:
reproduction breeding facts of life 

[3] : Moby Thesaurus II by Grady Ward, 1.0

93 moby thesaurus words for "procreation":
   abiogenesis, act of love, adultery, aphrodisia, archigenesis, ass,
   balling, begetting, biogenesis, birth, blastogenesis, breeding,
   budding, burgeoning, carnal knowledge, climax, cohabitation,
   coition, coitus, coitus interruptus, commerce, congress,
   connection, copula, copulation, coupling, crossbreeding,
   development, diddling, digenesis, dissogeny, endogamy,
   engenderment, epigenesis, eumerogenesis, excrescence, fornication,
   gemmation, generation, genesis, germination, growth, heterogenesis,
   histogenesis, homogenesis, inbreeding, intercourse, intimacy,
   isogenesis, linebreeding, lovemaking, making it with,
   marital relations, marriage act, mating, maturation, meat,
   merogenesis, metagenesis, monogenesis, multiplication, onanism,
   orgasm, orthogenesis, outbreeding, outgrowth, overgrowth, ovum,
   pangenesis, pareunia, parthenogenesis, proliferation, propagation,
   pullulation, relations, reproduction, screwing, sex, sex act,
   sexual climax, sexual commerce, sexual congress,
   sexual intercourse, sexual relations, sexual union, sleeping with,
   sperm, spontaneous generation, sprouting, upgrowth, vegetation,
   venery, xenogamy

[4] : Bouvier's Law Dictionary, Revised 6th Ed (1856)

procreation. the generation of children; it is an act authorized by the law 
of nature: one of the principal ends of marriage is the procreation of 
children. inst. tit. 2, in pr. 

Procreation >> P Words
Procreation, definition of term: Procreation
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