Learn how to say Ectodermal correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word ectoderm:
[mass noun] Zoology & Embryology
the outermost layer of cells or tissue of an embryo in early development, or the parts derived from this, which include the epidermis, nerve tissue, and nephridia. Compare with endoderm and mesoderm.
mid 19th century: from ecto- ‘outside’ + Greek derma ‘skin’