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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