a large brown seaweed that typically has a long, tough stalk with a broad frond divided into strips. Some kinds grow to a very large size and form underwater ‘forests' that support a large population of animals.
巨藻,大型褐藻。
the calcined ashes of seaweed, used as a source of various salts
(用作各种盐来源的)海草灰。
" late Middle English: of unknown origin. "