Local Area Transport 
Large Area Telescope 
Latitude 
Local Apparent Time 
Local Access Terminal 
Lateral 
Lathrop 
Lowest Astronomical Tide 
latch 
Local Area Terminal 
Large Angle Torque 
latency associated transcript 
Latin 
Local Address Table 
Local Area Transit 
Lunar Architecture Team 
Laboratory Acceptance Test 
Laboratory Animal Technician 
laboratory assessment team 
lactate threshold 
lactic acid threshold 
lactic acidosis threshold 
LADD Test 
Large Area Triangulation 
Large Array Telescope 
large neutral amino acid transporter 
Laser Acquisition and Tracking 
latency 
latency associated transcripts 
Lateral Latitude