sd

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SD¹

proper noun

  1. abbreviation, initialism Initialism of South Dakota: a state of the United States.
  2. abbreviation, initialism, uncountable Initialism of Secure Digital: a non-volatile memory card format developed for use in portable devices. I had responsibility for safely extracting SD cards and manually uploading footage onto the server.

noun SDs

  1. abbreviation, initialism Initialism of school district
  2. abbreviation, initialism Initialism of sheriff's department
  3. abbreviation, initialism Initialism of standard deviation
  4. abbreviation, initialism Initialism of self-destruct
  5. abbreviation, initialism Initialism of segmental duplication We estimated that the following percentage of elements were correctly assembled: 95.4% of alpha satellites; 91.5% of human satellites 2 and 3; 97.7% of segmental duplications (SDs); 94.3% of variable number tandem repeats (VNTRs); 94.2% of short tandem repeats (STRs); and 98.8% of all human repeats²
  6. abbreviation, initialism Initialism of sugar daddy

noun

  1. abbreviation, initialism, uncountable Initialism of standard definition (“typically 640×480 pixels”).

sd²

noun sds

  1. Alternative letter-case form of SD (“standard deviation”).

Thesaurus

Closest in meaning: bw, sk, carneiro, stated, declared, remarked, announced, asserted, proclaimed, articulated, voiced, uttered, mentioned, noted, observed, expressed

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MLA

"sd." Wiktionary, via Micwyn, micwyn.com/word/sd. Accessed 6 Nov. 2026.

APA

sd. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/sd

Chicago

"sd." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/sd.

BibTeX
@misc{sd_2026,
  title = {sd},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/sd},
  urldate = {2026-11-06}
}