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rubiginous

[roo-bij-uh-nuh s]
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adjective
  1. rusty; rust-colored; brownish-red.
Also ru·big·i·nose [roo-bij-uh-nohs] /ruˈbɪdʒ əˌnoʊs/.

Origin of rubiginous

1665–75; < Latin rōbīginōsus, equivalent to rōbīgin-, rūbīgin-, stem of rōbīgō, rūbīgō rust (akin to ruber red1) + -ōsus -ous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for rubiginous

rubiginous

adjective
  1. rust-coloured

Word Origin

C17: from Latin rūbīginōsus, from rūbīgō rust, from ruber red
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012