atoll
n.
1620s, atollon, from Malayam atolu "reef," probably from adal "closing, uniting." Popularized in present form by Darwin's writings.
| 词汇 | atoll | 
| 词根词缀 | Online Etymology Dictionary atoll n. 1620s, atollon, from Malayam atolu "reef," probably from adal "closing, uniting." Popularized in present form by Darwin's writings. | 
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