"polarity" in the noun sense
1. mutual opposition, polarity
a relation between two opposite attributes or tendencies
"he viewed it as a balanced polarity between good and evil"
2. polarity, sign
having an indicated pole (as the distinction between positive and negative electric charges
"he got the polarity of the battery reversed"
"charges of opposite sign"
Source: WordNet® (An amazing lexical database of English)
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