Meanings
nounSD card (plural SD cards)
plural SD cards
- A type of nonvolatile memory card.
I had responsibility for safely extracting SD cards and manually uploading footage onto the server.
2023, Martin MacInnes, In Ascension, Atlantic Books, page 44
Origin
From SD (“Secure Digital”) + card. The format was introduced in August 1999.
Full word history & related roots →Translations
Italian scheda SD
- scheda SDinitialism for Secure Digital card
Rhymes & wordplay
Rhymes with SD card
cardguardregardyardMastercardGerarddiscardbarreddisregardbardardgardpardscarredchardmarredlardshardcanardsardfardbrassardnardpetard
All rhymes →Cite this entry
APA
SD card. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/SD%20card
MLA
“SD card.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/SD%20card. Accessed November 4, 2026.
Chicago
WatkinsX Dictionary, s.v. “SD card,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/SD%20card.
Source: SD card on Wiktionary, CC BY-SA 4.0.