heptode

== English == === Etymology === From hept- +‎ -ode. === Pronunciation === (Received Pronunciation) IPA(key): /ˈhɛp.təʊd/ (General American) IPA(key): /ˈhɛpˌtoʊd/ Rhymes: -ɛptəʊd === Noun === heptode (plural heptodes) A compound thermionic valve containing a triode and tetrode; was used in superheterodyne radio receivers. ==== Translations ==== === See also === pentagrid converter