BTB may refer to:
In biology:
*
Blood–testis barrier in testicular anatomy
*
Blood–thymus barrier
* bTB, bovine tuberculosis or ''
Mycobacterium bovis
''Mycobacterium bovis'' is a slow-growing (16- to 20-hour generation time) Aerobic organism, aerobic bacterium and the causative agent of tuberculosis in cattle (known as bovine TB). It is related to ''Mycobacterium tuberculosis'', the bacterium ...
'', a disease in cattle
*
Breakthrough bleeding, of the menstrual period
*
Bromothymol blue, a chemical indicator for weak acids and bases
*
BTB/POZ domain, a protein domain
In other uses:
*
Belgian Union of Transport Workers, a trade union in Belgium
*
Branch target buffer
In computer architecture, a branch target predictor is the part of a processor that predicts the target, i.e., the address of the instruction that is executed next, of a taken conditional branch or unconditional branch instruction before the ta ...
, a computer processor element
*
Bétou Airport, in the Republic of the Congo (IATA airport code: BTB)
*
Basil Temple Blackwood (1870–1917), British book illustrator (credited as B.T.B.)
*''
Bob the Builder
''Bob the Builder'' is a British animated children's television series created by Keith Chapman for HIT Entertainment which ran from to in the United Kingdom through the CBBC strand and later CBeebies. The series centres on the adventures ...
'', British children's television series
*
Board-to-board connector (BTB)
{{disambiguation