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 ?
"I am the first reigning title holder to be hosting the show so whenever history is being made there certainly is pressure," she added.
A course and distance winner at the National meeting, a serious shake-up in the ante-post market on the blue riband will be in the offing if he does the job in the manner many anticipate - especially with reigning title holder Katchit having been turned over last weekend.
Calzaghe - who last year featured as one of 12 "Cool Cymru" celebrities in an exhibition of portraits by Terry Morris - is the current WBO, WBC, WBA and The Ring Magazine world super-middleweight champion and is the longest reigning title holder in any weight class in boxing.
Hobson accepted the ITV-televised bout at short notice after reigning title holder Johnny Nelson withdrew (Maccarinelli was the interim champion).
The 23-year-old Sheffield rider is on the verge of following in the tyre tracks of four-times WSB champion Carl Fogarty and reigning title holder Neil Hodgson, who now competes in MotoGP.
And he is upbeat about beating the reigning title holders in their own back-yard.
Ethan Conlin is the reigning title holder and odds-on-favourite to strike gold again in the Under-12s' event.
The 39-year-old Yorkshireman became the 15th individual winner of the game's most prestigious prize when he dethroned reigning title holder Ted Hankey with a 6-2 victory at the Lakeside.
Alvin Obero netted a goal in the 29th minute and it was just enough cushion for the Chiefs to defeat the reigning title holder for their second victory.
And Wales claimed a new world champion in the shape of Bronwen Tango, a freelance shepherdess from Abergavenny, who squeezed past reigning title holder, the Kiwi Sheree Alabaster, in the woolhandling final.
Newcastle University Boat Club president, Henry Pelly, threw down the challenge to reigning title holders Durham by offering the ceremonial oar blade to Durham's Boat Club president Martin Hill, cheered on by rowers from both clubs.