A simple listing of the technical abbreviations used in the 4th edition
µm = micrometer = micron | 
ml = milliliter | 
Å = angstrom | 
MLD = minimum lethal dose reported in literature | 
BCE = before current era | 
mM = milliMolar | 
BP = before present | 
mm = millimeter | 
bp= boiling point | 
mmp = mixed melting point | 
cm = centimeter | 
mp = melting point | 
dec. = with decomposition | 
ms = mass spectroscopy | 
dm = decimeter (10 cm.) | 
na = not available/applicable | 
et al. = et alia (“& others”) | 
nd = not detected | 
f = forma | 
nm = nanometer | 
ft = foot | 
nn = nomen nudum (named but lacking any description) | 
gc = gas chromatography | 
RT = room temperature | 
gm = gram | 
sc = subcutaneous | 
in = inch | 
sn = sine numero(lacking a collection number) | 
im = intramuscular | 
sp = species (singular) | 
ip = intraperitoneal | 
spp = species (plural) | 
ir = infrared | 
ssp = subspecies | 
iv = intravenous | 
subsp = subspecies | 
kg = kilogram | 
TD = toxic dose | 
kV = kilovolt | 
TLC = thin-layer chromatography | 
LD100 = lethal dose 100% | 
uv = ultraviolet | 
LD50 = lethal dose 50% | 
v = volt | 
mm = millimicron (= nm) | 
var = variety | 
m = meter | 
X = indicates a hybrid | 
ma = milliamp | 
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MAO = monoamine oxidase | 
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MAOI = mao inhibitor | 
