タンパク源げんMeanings1nounprotein source; source of proteinRefers to foods or ingredients that provide protein.大だい豆ずは優すぐれたタンパク源げんです。Soybeans are an excellent source of protein.肉にくや魚さかな以い外がいのタンパク源げんを探さがしている。I'm looking for protein sources other than meat and fish.