From ᮌᮨᮜᮧᮙ᮪ᮘᮀ (gelombang, “wave”) + ᮙᮤᮊᮢᮧ (mikro, “micro-”), calque of English microwave.
ᮌᮨᮜᮧᮙ᮪ᮘᮀ ᮙᮤᮊᮢᮧ • (gelombang mikro)