English dictionary
scaleback
Definitions, examples, synonyms and antonyms from WordNet 3.0.
noun
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Any one of numerous species of marine annelids of the family <i>Polynoidæ</i>, and allies, which have two rows of scales, or elytra, along the back. See <i>Illust.</i> under <u>Chætopoda</u>.
Source: webster1913