TDA

1.
tax-deferred annuity.
TDA
1.
tax-deferred annuity
2.
telecommunications and data acquisition
3.
Trade and Development Agency

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T.d.c.
abbreviation 1. top dead-centre
TDD
1. telecommunications device for the deaf. Telecommunications Device for the Deaf TDD telecommunications device for the deaf
Tdel
thick film dielectric electroluminescence

Tdem
TDEM time-domain electromagnetics
Tdf
language An intermediate language, a close relative of ANDF. A TDF program is an ASCII stream describing an abstract syntax tree. TDF became part of TenDRA in abut 2001. [“TDF Specification”, Defence Research Agency/Electronics Division, Great Malvern, England, +44 684 895314]. (2003-05-13) TDF testis-determining factor