do·mal I. \ˈdōməl\adjective Etymology: in sense 1, from Latin domus house + English -al; in sense 2 & 3, from dome (I) + -al 1.archaic: relating to a house 2.: shaped like a dome < a domal arrangement of the strata far beneath the ocean floor — R.E.Hardwicke > < a domal eruption > 3.: retroflex • do·mal·ly\-əlē\adverb II. noun (-s) : a domal speech sound