Dictionary.com
Thesaurus.com

methylthionine chloride

American  
[meth-uhl-thahy-uh-neen klawr-ahyd, -nin] / ˌmɛθ əlˈθaɪ əˌnin ˈklɔr aɪd, -nɪn /

noun

Chemistry.
  1. methylene blue.


methylthionine chloride British  
/ ˌmiːθaɪlˈθaɪəˌniːn /

noun

  1. another name for methylene blue

"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

Etymology

Origin of methylthionine chloride

First recorded in 1890–95; methyl- + thionine ( def. )