Definition of "embryonal" [em•bry•o•nal]

• Embryonic (adjective)

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• "Currently, treatment is based on whether a patient's cancer is classified as alveolar or embryonal, which is determined by the appearance of a tumour sample under the microscope."
• "Because of the "primitive" appearance of the heart, it is sometimes called "spongiform" or "embryonal" cardiomyopathy, and is thought to be caused by incomplete heart cell maturation."
• "Human skin is differentiated (i.e., adult), embryonal stem cells are not."