fertility rate is a noun meaning "the ratio of live births in an area to the population of that area; expressed per 1000 population per year". It carries one recorded sense.
the ratio of live births in an area to the population of that area; expressed per 1000 population per year
Definitions, synonyms and semantic relations for fertility rate come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.