Era

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ERA

Abbreviation for electronic remittance advice.

effective radiating area

,

ERA

The area of a therapeutic ultrasound head that produces useful ultrasonic energy, measured in square centimeters (cm2). The effective radiating area is calculated by identifying all points where the ultrasonic energy is at least 5% of the maximum measured intensity at the transducer's surface.

Era

a division of geological time, such as Cenozoic, Mesozoic, Palaeozoic, which is itself divided into periods. See GEOLOGICAL TIME.
References in periodicals archive ?
Bradord can still do it with a final match victory over Sheffield at Bradford (Hawksworth) on September 3 but only if Teesside slip up against reigning title holders Leeds at Woolley Park the same day.
SNOOKER: Reigning title holders Newcastle Labour Club take on Northern SC in the rearranged final of the Northumberland CIU Team Championship at King Street SC tonight (7.
The Greengauge Welsh Inter Club Championship looks interesting with just 15 points separating the top three clubs - Islwyn, Llanelli and reigning title holders Cardiff.
Six times Premier One champions Frank Parker and reigning title holders Ridge Lane have seen their Tribune Cup ambitions come to an abrupt halt despite winning their first round ties in emphatic fashion.
Lezama prevailed over nine other finalists to win the contest's reigning title and a Panasonic Palmcorder, a grand prize worth approximately $800.
Robson did fend off another one in the final game of the match although, at the ninth time of asking, the reigning title holder managed to close it out.
He said: "I can't see the reigning title holders slipping up in the championship race.
The longest reigning title holder in any weight class in boxing recently passed the ten-year mark as the WBO super-middleweight champion.
Moore was stretching his advantage over reigning title holder Jamie Spencer at the head of the jockeys' championship to 32 with this victory.
Then as the safety car returned Montoya showed why he is being tipped as a potential future world champion with a thrilling overtaking move in his Williams on the reigning title holder.
However, Sea Pigeon and Hatton's Grace both staged repeat victories at 11, while the reigning title holder's Tote Gold Trophy effort hardly suggests regression.