First Known Use: 1858
Dictionary
1tat
verb \ˈtat\
tat·tedtat·ting
Definition of TAT
intransitive verb
: to work at tatting
transitive verb
: to make by tatting
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Origin of TAT
back-formation from tatting
2tat
noun \ˈtat\
Definition of TAT
: a small protein produced by a lentivirus (as HIV) that greatly increases the rate of viral transcription and replication and enhances the susceptibility of T cells to infection; also : the viral gene that codes for the tat protein
Origin of TAT
trans-activating transcriptional regulation
First Known Use: 1985
Other Biochemistry Terms
3tat
noun \ˈtat\
TAT
abbreviation
Definition of TAT
thematic apperception test
Other Psychology Terms
Medical Dictionary
tat
noun , often capitalized \ˈtat\
Medical Definition of TAT
1
: a small protein produced by a lentivirus (as HIV) within infected cells that greatly increases the rate of viral transcription and replication and that is also secreted extracellularly where it plays a role in increasing viral replication in newly infected cells and in enhancing the susceptibility of T cells to infection—called also tat protein
2
: the viral gene that codes for the tat protein
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