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.
Definition of epiphysis. plural. epiphyses. play \i-Ëpi-fÉ-ËsÄz\. 1 : a part or process of a bone that ossifies separately and later becomes ankylosed to the main part of the bone; especially : an end of a long bone. 2 : pineal gland.