| 单词 | sand dollar |
| 释义 | sand dollar in British Englishnoun any of various flattened disclike echinoderms of the order Clypeasteroida, of shallow North American coastal waters: class Echinoidea (sea urchins) sand dollar in American English US any of an order (Clypeasteroida) of flat, round, disklike echinoid echinoderms that live on sandy ocean beds |
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