sd
noun
- 1
(law enforcement) Initialism of sheriff's department.
- 2
Initialism of self-destruct.
noun
- 1
A governmental district that operates local public primary and secondary schools.
noun
- 1
A system that uses a resolution that is not considered to be either high-definition television (720p, 1080i, 1080p, 1440p, 4K UHDTV, and 8K UHD) or enhanced-definition television (EDTV 480p).
Synonyms
noun
- 1
A measure of how spread out data values are around the mean, defined as the square root of the variance. Represented with the Greek letter σ.
Synonyms
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