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negative ions

finds documents containing negative or ions

negative or ions

same as above

negative and ions

finds documents containing both negative and ions

negative not ions

finds documents containing negative but not ions

(negative not ions) and ionizer

finds documents containing ionizer, plus negative but not ions

ion*

finds documents containing words starting with ion. Will find any documents containing ion, ions, ionizers, ionisers, etc..

This search page allows queries to be formed from word sequences containing the words AND, OR, and NOT, and grouped with parentheses.