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Echo Valley
Echo Valley is a 2025 Apple Original Films thriller directed by Michael Pearce, written by Brad Ingelsby, starring Julianne Moore and Sydney Sweeney as a mother and daughter entangled in a cover-up after Claire arrives home covered in blood; streamed on Apple TV+ from June 13, 2025.
Echo-planar imaging
Echo-planar imaging (EPI) is a fast MRI pulse sequence, proposed by Peter Mansfield in 1977, that acquires images in tens of milliseconds and underlies fMRI and diffusion imaging.
Echocardiography
Echocardiography, also known as cardiac ultrasound, is a non-invasive test using ultrasound waves to image the heart, developed by Inge Edler and Carl Hertz in Sweden in 1953.
Echodyne
Echodyne Corp. is a privately held American radar company founded in 2014 in Kirkland, Washington, as a spin-off from Intellectual Ventures, making compact radars for defense and counter-drone markets.
Echoencephalography
Echoencephalography: A-mode ultrasound technique, introduced by Lars Leksell (1953-1956), measuring midline brain echoes, especially the pineal, to detect shift from intracranial masses; superseded by CT.
Echoes (miniseries)
Echoes is a 2022 Netflix seven-episode limited mystery thriller created by Vanessa Gazy, starring Michelle Monaghan as identical twins Leni and Gina who secretly swap lives until one disappears; it topped Netflix charts despite poor reviews.
Echoes (Pink Floyd song)
"Echoes" is a 23-minute progressive rock song by Pink Floyd, released on Meddle in 1971 and built around a sonar-like piano ping created with a Leslie speaker.
Echoes of an Autobiography
Echoes of an Autobiography (أصداء السيرة الذاتية) is a 1995 collection of over 200 very short prose pieces by the Egyptian novelist and Nobel laureate Naguib Mahfouz.
Echoes of Mana
Echoes of Mana was a free-to-play mobile action RPG in the Mana series, published by Square Enix and developed by Wright Flyer Studios for iOS and Android.
Echoes of Silence
Echoes of Silence is the third and final mixtape in the Weeknd's 2011 trilogy, released free on December 21, 2011, following House of Balloons and Thursday.
Echoes of the Rainbow (岁月神偷)
Echoes of the Rainbow (岁月神偷), also known as 1969太空漫游, is a 2010 Hong Kong family drama by Alex Law, produced by Mabel Cheung, set in 1969 Wing Lee Street; it won the Berlin Crystal Bear and four Hong Kong Film Awards and saved the street from demolition.
Echoes, Silence, Patience & Grace
Echoes, Silence, Patience & Grace is the Foo Fighters' sixth studio album, released September 25, 2007 on Roswell/RCA, produced by Gil Norton. It blends the hard rock and acoustic sides of In Your Honor on one disc, hit UK No. 1, and won the 2008 Grammy for Best Rock Album.
Echoes: The Best of Pink Floyd
Echoes: The Best of Pink Floyd is a 26-track, 2-hour-35-minute two-CD compilation released November 5, 2001, spanning 1967-1994 with non-chronological crossfaded sequencing, Thorgerson artwork, edited tracks, and When the Tigers Broke Free on CD for the first time.
Echogenic intracardiac focus
Echogenic intracardiac focus (EIF): a small bright spot under 6 mm in a fetal cardiac ventricle on second-trimester ultrasound, a soft marker for trisomy 21 found in 3–5% of normal fetuses, managed as a normal variant after negative screening.
Echolalia
Echolalia, the immediate or delayed repetition of others' speech, is common in autism (estimates 25–91%), appears in typical early language development, and occurs in aphasia, Tourette syndrome, schizophrenia, and other conditions; increasingly viewed as communicative.
Echolocation
Echolocation is a form of active sensing in which animals emit sounds and use the returning echoes to determine the location and distance of objects, best known in bats and toothed whales.
ECHOPP study
ECHOPP (NCT04348734), Management of Parapneumonic Pleurisy Guided by an Early Pleural Ultrasound: completed French prospective multicentre observational cohort of 115 adults with pneumonia, testing daily pleural ultrasound for 96 hours with an algorithm-guided drainage strategy.
Echoriath Montes
Echoriath Montes, a mountain range on Saturn's moon Titan, IAU-approved in 2011 and named for Tolkien's Encircling Mountains of Beleriand; about 930 km across near the equator, mapped by Cassini radar.
Echosmith
Echosmith, American alt-pop band formed 2009 in Chino, California, by the Sierota siblings; formerly Ready, Set, Go!. Known for triple-platinum "Cool Kids" (No. 13 Hot 100), "Bright," albums Talking Dreams, Lonely Generation, Echosmith.
EchoStar
EchoStar Corporation is an American telecommunications company headquartered in Englewood, Colorado, whose brands include Boost Mobile, DISH TV, Sling TV, Hughes, and HughesNet satellite internet.
EchoStar XXIV
EchoStar XXIV, marketed as JUPITER 3, is a geostationary communications satellite built by Maxar for Hughes, launched by SpaceX in 2023 to deliver broadband across the Americas.
Echothiophate
Echothiophate iodide (Phospholine Iodide), an irreversible organophosphate acetylcholinesterase inhibitor eye drop, lowers intraocular pressure in open-angle and aphakic glaucoma and treats accommodative esotropia; long-acting, scarce supply.
Echsenbach
Echsenbach, a market municipality in the Waldviertel, Lower Austria (Zwettl district, postal code 3903), home of the 1963-founded football club USC Hartl Haus Echsenbach of the 1. Klasse Waldviertel; distinct from Eschenbach LU, Eschenbach (Oberpfalz), and Eschbach clubs.
Echternach
Echternach (Iechternach) is Luxembourg's oldest town, on the Sauer at the German border, built around the Benedictine abbey Saint Willibrord founded in 698; famous for the Whit Tuesday Hopping Procession inscribed by UNESCO in 2010, a Roman villa, and the Mullerthal region.
Echus Chaos
Echus Chaos, a 473-481 km wide chaotic terrain of low hills on Mars between Lunae Planum and Echus Palus, south of Kasei Valles; IAU-named 1985 from albedo feature Echus Lacus, possibly formed by downhill sliding of plateau rocks.
Echus Chasma
Echus Chasma, a 100 km long, 10 km wide canyon in Mars' Lunae Planum north of Valles Marineris; source of the Kasei Valles outflow channel and its 3.6–3.4 billion-year-old mega-floods.
Echus Fossae
Echus Fossae: IAU-approved (1988) graben system on Mars near Echus Chasma, Lunae Palus quadrangle, centered at 2.87N, 283.10E, about 400 km across; classical albedo feature name.
Echus Montes
Echus Montes (IAU, 1985) is a ~395-km-diameter group of mesas and mountains on Mars at 7.81°N, 282.05°E, beside Echus Chasma at the head of Kasei Valles, mapped as wallrock or chaotic-terrain mesas.
Echus Palus
Echus Palus is a 715-km-wide lava-flooded plain on Mars at 12.29N, 282.73E, approved by the IAU in 2016 from the classical albedo feature Echus Lacus, at the head of Kasei Valles near Echus Chasma.
Echzell
Echzell, Hesse, Germany: site of one of the largest Roman forts (5.2 ha) on the Upper German-Raetian Limes, garrisoned from about AD 90 to 260 by the Ala I Flavia Gemina and an infantry cohort, with a vicus of 4,000-5,000 people; fort baths lie under the village church.