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Terms for subject
Abbreviation
(892637 entries)
operator
o
operation
o
occidental
o
oil
o
old
o
olive
o
only
o
opera
o
opposite
o
optical
o
opus
o
overcast
o
occasional occurrence of species
o
organic horison
o
out of gauge
o
O
Ordovician period
O
organism
O
ouadi
O
Blood Type In The ABO Blood Group
O
eye
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