LDA may stand for:*Laser Doppler Anemometry (velocimetry) Left displaced abomasum Legal drinking age Legal document assistant Liga Deportiva Alajuelense, a Costa Rican football club Linear diode array Lithium diisopropylamide Living donor allograft LoaD Accumulator, an opcode from the MOS Technology 6502 instruction set Local-density approximation, in quantum-mechanical density functional theory Local delivery agent, a synonym for mail delivery agent Localizer Type Directional Aid, in… (More on Lda)