Attention deficit hyperactivity disorder (ADHD) should be diagnosed and treated in children as young as age 4, according to new guidelines from the American Academy of Pediatrics. Skip to main content
ephemeris. 1  a table showing the positions of a heavenly body on a number of dates in a regular sequence. 2  an astronomical almanac containing such tables. 3  Archaic. an almanac or calendar.
Sper (Georgia), ancient Georgian principality. Sper (Armenia), old region of old Armenia. South Pacific Electric Railway, which operates the Sydney Tramway Museum. Solid phase epitaxial regrowth, a method to obtain epitaxial layers of good quality.