Webster
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Webster’s Revised Unabridged Dictionary · 1913

Scaleback

Scale′back′, n. (Zoöl.) Any one of numerous species of marine annelids of the family Polynoidæ, and allies, which have two rows of scales, or elytra, along the back. See Illust. under Chætopoda.

Webster’s Revised Unabridged Dictionary, Noah Porter, editor (Springfield, Mass.: G. & C. Merriam, 1913). Public domain. Text as transcribed by MICRA, Inc., from Project Gutenberg. Changed for Deep Dive Bible: Greek, which our source spelled in Latin letters, set in Greek letters; entries of one spelling merged into one article; Greek words our source left out (shown as “?”), read from the 1898 printing, from the same plates (the Library of Congress’s copy), where the place could be found with certainty.