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Sr (no period),
strontium (chemical element).
Sr.,
1. Portuguese. senhor.
2. senior.
3. Spanish. señor.
4. sir.
5. Sister.
S.R.,
Sons of the Revolution.
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symbol the chemical element strontium
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See also: ↑Snr
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siacurvariant of (Anglo-Ind.) seer.
Useful english dictionary. 2012.