Etymology
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manta (n.)

very large ray (also called devilfish), 1760, from Spanish manta "blanket" (which is attested in English from 1748 in this sense, specifically in reference to a type of wrap or cloak worn by Spaniards), from Late Latin mantum "cloak," from Latin mantellum "cloak" (see mantle (n.)). The ray so called "for being broad and long like a quilt" [Jorge Juan and Antonio de Ulloa, "A Voyage to South America"].

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mantilla (n.)

woman's head-covering, often of lace, which falls down upon the shoulders and may be used as a veil, 1717, from Spanish mantilla, diminutive of manta "blanket," from Late Latin mantum "cloak," from Latin mantellum "cloak" (see mantle (n.)).

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