BTB may refer to:
In biology:
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Blood–testis barrier
The blood–testis barrier is a physical barrier between the blood vessels and the seminiferous tubules of the animal testicle, testes. The name "blood-testis barrier" is misleading in that it is not a blood-organ barrier in a strict sense, but is ...
in testicular anatomy
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Blood–thymus barrier
The blood–thymus barrier regulates exchange of substances between the circulatory system and thymus, providing a sequestered environment for immature T cells to develop. The barrier also prevents the immature T cells from contacting foreign ant ...
* Bovine tuberculosis or ''
Mycobacterium bovis
''Mycobacterium bovis'' is a slow-growing (16- to 20-hour generation time) aerobic bacterium and the causative agent of tuberculosis in cattle (known as bovine TB). It is related to ''Mycobacterium tuberculosis'', the bacterium which causes tube ...
'', a disease originating in cattle
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Breakthrough bleeding
Intermenstrual bleeding, previously known as metrorrhagia, is uterine bleeding at irregular intervals, particularly between the expected menstrual periods. It is a cause of vaginal bleeding.
In some women, menstrual spotting between periods occ ...
, of the menstrual period
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Bromothymol blue
Bromothymol blue (also known as bromothymol sulfone phthalein and BTB) is a pH indicator. It is mostly used in applications that require measuring substances that would have a relatively neutral pH (near 7). A common use is for measuring the pre ...
, a chemical indicator for weak acids and bases
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BTB/POZ domain
The BTB/POZ domain is a common structural domain contained within some proteins.
The BTB (for BR-C, ttk and bab) or POZ (for Pox virus and Zinc finger) domain is present near the N-terminus of a fraction of zinc finger proteins and in proteins th ...
, a protein domain
In other uses:
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Belgian Union of Transport Workers
The Belgian Union of Transport Workers ( nl, Belgische Transportbond, BTB; french: Union Belge du Transport, UBT) is a trade union representing transport workers in Belgium.
History
The union was founded on 6 June 1913, with the merger of numerous ...
, a trade union in Belgium
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Branch target buffer
In computer architecture, a branch target predictor is the part of a processor that predicts the target of a taken conditional branch or an unconditional branch instruction before the target of the branch instruction is computed by the execution ...
, a computer processor element
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Bétou Airport
Bétou Airport is an airport within the town of Bétou in the Likouala Department, Republic of the Congo. The runway also serves as part of the road leading westward out of town.
Bétou is on the Ubangi River, the border with the Democratic R ...
, in the Republic of the Congo (IATA airport code: BTB)
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Basil Temple Blackwood
Lord Ian Basil Gawaine Hamilton-Temple-Blackwood (4 November 18703 July 1917), known as Lord Basil Temple Blackwood, was a British lawyer, civil servant and book illustrator.
Early life
Temple Blackwood was the third son and fifth child of Fre ...
(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 and Hot Animation. The series follows the adventures of Bob, a building contractor, specialising in masonry, along with hi ...
'', British children's television series
{{disambiguation