SD

SD

1. (international standards) ISO 3166-1 alpha-2 country code for Sudan.

   Synonym: SDN (alpha-3)

2. (finance) Long-term bond credit rating by S&P Global Ratings, indicating that a bond is in default, with little prospect of debt recovery.

SD

1. Initialism of South Dakota.
2. (uncountable) Initialism of Secure Digital: a non-volatile memory card format developed for use in portable devices.

• (memory card format): microSD, miniSD, SDHC, SDIO, SDXC

SD (plural SDs)

1. Initialism of school district.
2. (law enforcement) Initialism of sheriff's department.
3. (mathematics) Initialism of standard deviation.
4. (video games) Initialism of self-destruct.
5. (genetics) Initialism of segmental duplication.
   • 2023 May 11, Wen-Wei LiaoMobin AsriJana Ebleret al., “A draft human pangenome reference”, in Nature, volume 617, →DOI, page 313:

     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 repeats²⁶.

SD (uncountable)

1. (television) Initialism of standard definition (“typically 640×480 pixels”).

   Coordinate term: HD

• D's, D. S., D.S., DS, Ds, D♭s, D♯s, d's, ds

SD

1. Initialism of sekolah dasar (“primary school”).

• IPA^(key): [sɨᵝːpa̠ː de̞ɸo̞ɾɯ̟ᵝme̞]

SD(スーパーデフォルメ) • (sūpā deforume) 

1. Abbreviation of スーパーデフォルメ.

SD

1. (grammar, syntax) Initialism of sintagma determinante (“determiner phrase”).

SD n (genitive SD:s)

1. (politics) Initialism of Sverigedemokraterna (“Sweden Democrats”).
   • 2013 November 24, “SD varnas för Le Pen [The SD is warned about Le Pen]”, in Metro‎, archived from the original on 1 November 2014:

     SD:s internationelle sekreterare Kent Ekeroth deltar i samtal om samarbete med bland andra Front National, FPÖ[...]

     The SD's international secretary Kent Ekeroth participates in discussions regarding cooperation with Front National, FPÖ[...], among others.

   • 2014 September 15, Örjan Magnusson, “Ideologiska skillnader stoppar SD-samarbete [Ideological differences prevent cooperation with the SD]”, in SVT Nyheter [SVT News]‎, SVT, retrieved 5 May 2020:

     På valkvällen sade Socialdemokraternas partiledare, den blivande regeringsbildaren Stefan Löfven, att det inte kommer att bli något samarbete med SD trots att partiet blivit mycket större.

     On the dawn of the election, the leader of the Swedish Social Democratic Party and prospective head of government Stefan Löfven stated that there was not to be any cooperation with the SD despite the party having grown considerably.