n. [ Gr. blasto`s sprout + E. derm. ] (Embryology) the early stage of an embryo after the first cleavages of the ovum; also, the layer of cells of which the early embryo is composed; specifically:(a) the early embryo developing from a blastodisc, after the blastocoel has formed. (b) in an insect embryo, the layer of cells that surrounds the internal mass of the yolk. [ PJC ]
n. [ Gr. blasto`s sprout + E. derm. ] (Embryology) the early stage of an embryo after the first cleavages of the ovum; also, the layer of cells of which the early embryo is composed; specifically:(a) the early embryo developing from a blastodisc, after the blastocoel has formed. (b) in an insect embryo, the layer of cells that surrounds the internal mass of the yolk. [ PJC ]
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เช่น Secretary of State=รัฐมนตรีต่างประเทศของสหรัฐฯ (ในภาพตัวอย่าง),
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