The Clue
Paleozoic et al. (4 letter answer)
The Answer
ERAS
Tags
Notes
The answer ERAS is very common and appears about once every 35 puzzles.
Related Clues
Ages
Cycles
Epochs
Periods
Times
Alexandrian and Babylonian
Big times
Cenozoic and Paleozoic
Chapters in history
Christian and Abraham
Chronological periods
Distinctive times
Extended periods
Geological divisions
Great times
Historians' subjects
Historic periods
Historic times
Historical times
Macedonian and Mohammedan
Memorable periods
Memorable times
Mesozoic and Cenozoic
Paleozoic and Mesozoic
Periods for geologists
Special times
Time periods
Time spans
Timeline divisions
Times on a timeline
Turning points
Varro and Vulgar
Victorian and Edwardian
Vulgar and Mayan
"-zoic" periods
Chapters in world history
Mohammedan and Christian, e.g.
Noteworthy periods of time
Periods divide them
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