(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
a major division of geological time; an era is usually divided into two or more periods
a period marked by distinctive character or reckoned from a fixed point or event
Abbreviation for Engine Room Artificer - rank in Royal Navy
FIRST
indicating the beginning unit in a series
the fielding position of the player on a baseball team who is stationed at first of the bases in the infield (counting counterclockwise from home plate)
the lowest forward gear ratio in the gear box of a motor vehicle; used to start a car moving
an honours degree of the highest class
the first element in a countable series; "the first of the month"
the first or highest in an ordering or series; "He wanted to be the first"
before anything else; "first we must consider the garter snake"
the time at which something is supposed to begin; "they got an early start"; "she knew from the get-go that he was the man for her"
the initial time; "when Felix first saw a garter snake"
prominently forward; "he put his best foot foremost"
ranking above all others; "was first in her class"; "the foremost figure among marine artists"; "the top graduate"