Simple past tense and past participle of metamorphose.(verb)
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Use "metamorphosed" in a sentence
"This short video advertising Kellogg's Raisin Bran Crunch shows a reformed alien sitting at the breakfast table, engaged in a rambling monologue about how he has metamorphosed from a scary flesh-eating monster into a pilates-practicing, go-with-the-flow type of guy that you might want to sit down and have a bowl of cereal with."
"In order to prove his conservative credentials and beat Romney McCain metamorphosed into Bush."
"Somewhere along the line, perhaps around the time most people forgot its steps, the name metamorphosed into a sweeping term that could encompass almost all of African-American popular music, or at least everything that has arisen since World War II."