Heaviside layer heaving pile • heavy-armed · · · Info · Definitions · Characters · · Heaviside layer · · Text Common · · Latin · · Scripts 15 · · Length Definitions · · · (noun) a region of the ionosphere (from 50 to 90 miles up) that reflects radio waves of medium length. Synonyms: Kennelly-Heaviside layer, E layer, E region. · · Noun Definition 1 Characters · · space U+0020 H latin capital letter h U+0048 a latin small letter a U+0061 d latin small letter d U+0064 e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C r latin small letter r U+0072 s latin small letter s U+0073 v latin small letter v U+0076 y latin small letter y U+0079