BTD

Biological Therapies in Dentistry [periodical, périodique]
Found on http://www.encyclo.co.uk/local/20895

BTD

Bored To Death
Found on http://www.encyclo.co.uk/local/21662

btd

bored to death
Found on http://www.noslang.com/dictionary/b/

BTD

R2-D2
Found on http://www.swbookzone.com/glossary.html
No exact match found