kelp
/kelp/noun
mass noun
1- 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。
1.1
- Family Laminariaceae, class Phaeophyceae, including the genera Laminaria (used in some areas as manure) and Macrocystis (harvested in the US as a source of algin).海带科, 褐藻纲, 包括海带属（某些地区用作肥料）、巨藻属（美国用作褐藻胶原料）。
1.2
- the calcined ashes of seaweed, used as a source of various salts（用作各种盐来源的）海草灰。
词源
late Middle English: of unknown origin.