stone·wort /-ˌwɝt, ˌwɔrt/
車軸藻類的植物
Stone·wort n. Bot. Any plant of the genus Chara; -- so called because they are often incrusted with carbonate of lime. See Chara.
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stonewort
n : any of various submerged aquatic algae of the genus Chara
having nodes with whorled filamentlike branches; usually
encrusted with calcium carbonate deposits