dys·ger·mi·no·ma \dəsˌjərməˈnōmə, (ˌ)dis-\noun (pluraldysgerminomasordysgerminomata) Etymology: New Latin, from dys- + Latin germin-, germen sprout, bud, germ + New Latin -oma — more at germ : a malignant tumor of the ovary arising from undifferentiated germinal epithelium