L
left / litre / liver / low / lumbar
L1-5
lumbar vertebrae one to five
L & D
labour and delivery
LA
local anaesthetic / left arm / left atrium
LABA
long acting beta agonist
lac
laceration / lactic
LAD
left axis deviation (ECG)
LAE
left atrial enlargement
lat
lateral
LBP
lower back pain
LC
lethal concentration
LD50
lethal dose 50%
LDA
left dorsal anterior
LDP
left dorsal posterior
LFTs
liver function tests
Lg
large
lig
ligature / ligament
Liq.
liquid
LKS
liver, kidney, spleen
LN or L/N
lymph node
LOM
loss of movement
LP
lumbar puncture
LRQ
lower right quadrant
LRTI
lower respiratory tract infection