(1)any aquatic plant of the genus Ceratophyllum; forms submerged masses in ponds and slow-flowing streams
(2)マツモ属の水生植物の総称
(3)池や流れの緩い川で沈水生の群落をつくる
(4)liverworts with slender hornlike capsules
(5)細長い角のようなカプセルがあるゼニゴケ類