Ectoderm meaning

ĕktə-dûrm
The outermost of the three primary germ layers of an embryo, from which the epidermis, nervous tissue, and, in vertebrates, sense organs develop.
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The outer layer of a diploblastic animal, such as a jellyfish.
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The outer layer of cells of an animal embryo, from which the nervous system, skin, hair, teeth, etc. are developed.
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The layer or layers of cells composing the skin, nervous system, etc. in all animals except protozoans and sponges.
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The outermost of the three primary germ layers of an embryo, from which the epidermis, nervous tissue, and, in vertebrates, sense organs develop.
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The outer layer of a diploblastic animal, such as a jellyfish.
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The outermost of the primary germ layers of an animal embryo. In vertebrates, the ectoderm gives rise to the epidermis and associated tissues (such as hair and sweat glands), enamel of the teeth, sense organs, nervous system, and lining of the nose, mouth, and anus.
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Outermost of the three tissue layers in the embryo of a metazoan animal. Through development, it will produce the epidermis (skin) and nervous system of the adult.
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