Enter a clue or pattern or both:
The Clue
Geologic divisions (4 letter answer)
The Answer
ERAS
Tags
Notes
The answer ERAS is very common and appears about once every 35 puzzles.
Related Clues
Ages
Christian et al.
Epochs
Periods
Siècles
Alexandrian and Babylonian
Augustan and Caesarean
Big times
Blocks of history
Bullpen stats
Christian and Caesarean
Christian and others
Chronological periods
Geologic succession
Greek and Roman
Historic periods
Historic times
Historical periods
Historical times
History units
Mound stats
Notable periods
Paleozoic and Mesozoic
Period pieces?
Periods for geologists
Periods of time
Precambrian and others
Stats for hurlers
Time divisions
Time periods
Time spans
Times gone by
Times past
Times on a timeline
Memorable periods of time
Theme-dominated times
Time and time again?
Times to write about
Gay Nineties and Roaring Twenties
Definition
ERA as a noun:
1. (era, epoch) = a period marked by distinctive character or reckoned from a fixed point or event
2. (era, geological era) = a major division of geological time; an era is usually divided into two or more periods
3. (earned run average, ERA) = (baseball) a measure of a pitcher's effectiveness; calculated as the average number of earned runs allowed by the pitcher for every nine innings pitched