Any of several submerged plants of the genus Ceratophyllum,forming branched masses in quiet water and having finely dissected,whorled leaves and minute unisexual flowers. 角苔,一種金魚(yú)藻屬的水下植物,在風(fēng)平浪靜時(shí)會(huì )形成縱橫交錯的樹(shù)枝網(wǎng),生有輪生的多裂葉,開(kāi)極小的單性花。