dicotyledon的意思？

dicotyledon的音标：dicotyledon的英式发音音标为：[ˌdaɪkɒtɪ'li:dən]dicotyledon的美式发音音标为：[ˌdaɪkɑtɪ'lidən]...

The turf fibre cover is provided with the fertilizer, bactericidal agent and dicotyledon herbicide.所述草纤维覆盖层置有肥料, 杀菌剂,双子叶除草剂....