birthrate

from WordNet (r) 3.0 (2006)

birthrate
    n 1: the ratio of live births in an area to the population of
         that area; expressed per 1000 population per year [syn:
         {birthrate}, {birth rate}, {fertility}, {fertility rate},
         {natality}]

from The Collaborative International Dictionary of English v.0.48

birthrate \birthrate\n.
   the ratio of live births in an area to the population of that
   area; usually expressed as birthes per 1000 population per
   year.

   Syn: fertility, fertility rate.
        [WordNet 1.5]

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