blue printblue whale

blue vitriol (English) [ IPA: ˈbluː ˈvɪtriːəl ASM: ব্লু ভিট্ৰিয়ল]
Contributed by: Himjyoti Talukdar on 2010-04-18
1. (Material Noun-Neuter) a green chemical substance often seen on copper or brass items তামৰ কঁহৰ পৰা কৰা এবিধ সেউজীয়া বস্তু