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.
First Known Use of EPISOME. noun epiÂ·some \Ëep-É-ËsÅm, -ËzÅm\. : a genetic determinant (as the DNA of some bacteriophages) that can replicate either autonomously in bacterial cytoplasm or as an integral part of their chromosomesâcompare plasmid. â epiÂ·somÂ·al \Ëep-É-ËsÅ-mÉl, -ËzÅ-\ adjective.pisome. noun epiÂ·some \Ëep-É-ËsÅm, -ËzÅm\. : a genetic determinant (as the DNA of some bacteriophages) that can replicate either autonomously in bacterial cytoplasm or as an integral part of their chromosomesâcompare plasmid.