say it: kuhn-tem-pur-AY-nee-uh-slee
contemporaneously is an adverb meaning "during the same period of time". It carries one recorded sense.
during the same period of time
“contemporaneously, or possibly a little later, there developed a great Sumerian civilisation”
Definitions, synonyms and semantic relations for contemporaneously come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.