Webster
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Webster’s Revised Unabridged Dictionary · 1913

Mattress

Mat′tress, n. [OF. materas, F. matelas, LL. matratium; cf. Sp. & Pg. almadraque, Pr. almatrac; all from Ar. maṭrah a place where anything is thrown, what is thrown under something, fr. ṭaraha to throw.]

1. A quilted bed; a bed stuffed with hair, moss, or other suitable material, and quilted or otherwise fastened. [Written also matress.]

2. (Hydraulic Engin.) A mass of interwoven brush, poles, etc., to protect a bank from being worn away by currents or waves.

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.