单词 | seif |
释义 | seif/siːf / /seɪf /(also seif dune) noun A sand dune in the form of a long, narrow ridge.Linear or seif dunes occur in areas of more variable winds and show less lateral movement; star-shaped dunes develop in areas of very variable winds and show little lateral movement and considerable vertical accretion. OriginEarly 20th century: from Arabic sayf 'sword' (because of the shape). Rhymes |
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