era

noun3

1. •
   a long period of time, usually of many years, with no exact start or end
2. •
   A geochronologic unit of tens to hundreds of millions of years; a subdivision of an eon, and subdivided into periods.
3. •
   (informal) An indefinite period of time in one’s life characterized by a particular interest.

noun5

1. •
   Initialism of earned run average, a baseball statistic.

   • Taylor, listed at 6-foot-3 and 230 pounds, went 0-1 with a 1.01 ERA in 15 games for Birmingham. He struck out 37 in 26 2/3 innings. — 2025
2. •
   Initialism of explosive reactive armor.
3. •
   (UK) Initialism of engine room artificer, a Royal Navy position.
4. •
   Initialism of Earth rotation angle (the rotation of the Earth from the Celestial Intermediate Origin that has no instantaneous motion along the equator.)
5. •
   Initialism of electrically reconfigurable array.