| 释义 |
ectoderm/ˈektədɜːm/noun 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
派生词 词源 mid 19th cent.: from ECTO-'outside' + Greek derma 'skin'. |