Definition from Wiktionary, the free dictionary
Alternative forms 
- coæval (archaic)
coeval (not comparable)
- Of the same age; contemporary.
- ‘Anything coeval with that clock will fetch a hefty price!’
- The Baralaba Coal Measures are coeval with the Bandana Formation.
of the same age
coeval (plural coevals)
- Something of the same era or age.
- The telephone and television are coevals in that film.
- For usage examples of this term, see the citations page.
something of the same era