sd

plural sds

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

1. abbreviationinitialismpostalInitialism of South Dakota: a state of the United States.
2. abbreviationinitialismuncountableInitialism 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.

   2023, Martin MacInnes, In Ascension, Atlantic Books, page 44

plural SDs

1. abbreviationinitialismInitialism of school district.
2. abbreviationinitialismgovernmentInitialism of sheriff's department.
3. abbreviationinitialismmathematicsInitialism of standard deviation.
4. abbreviationinitialismvideo gamesInitialism of self-destruct.
5. abbreviationinitialismbiologyInitialism of segmental duplication.

   1 more example

   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.

   2023 May 11, Wen-Wei Liao, Mobin Asri, Jana Ebler, et al., “A draft human pangenome reference”, in Nature, volume 617, →DOI, page 313

6. abbreviationinitialismrelationshipsInitialism of sugar daddy

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