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1. Oxford American Dictionary

   cotton grass

   • IPA[ˈkätn ˌɡras]

   • n.
     a sedge that typically grows on swampy land in the northern hemisphere, producing tufts of long white silky hairs, which aid in the dispersal of the seeds.

   • noun: cotton grass, plural noun: cotton grasses

2. • 更多解釋

   cotton grass

   • n.
     a sedge which typically grows on wet moorlands in the northern hemisphere, producing tufts of ...

   Oxford Dictionary