柯林斯詞典endosperm /??nd???sp??m/ 1. N the tissue within the seed of a flowering plant that surrounds and nourishes the developing embryo 胚乳 返回 endosperm劍橋詞典the substance inside a plant seed that surrounds and provides food for the embryo as it develops 胚乳（植物種子內(nèi)包裹胚芽竝在其發(fā)育過程中爲(wèi)其提供養(yǎng)分的物質(zhì)） 返回 endosperm