index card

American  

noun

• index cards
  plural

1. a card, often relatively small, as 3 × 5 inches (7.6 × 12.7 centimeters), used in noting or recording information and usually filed in an index.

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Other Word Forms

Noun Inflected Forms

• index cards
  plural

Etymology

Origin of index card

First recorded in 1925–30

Example Sentences

See Examples For:

index card

When the NFL draft begins on Thursday night, Commissioner Roger Goodell will hardly need to glance at an index card to know that the Raiders intended to use the first overall pick on Mendoza.

From The Wall Street Journal ● Apr. 23, 2026

And they had an index card, recently discovered by one of Garcetti’s investigators in the office files, that listed Butler as a D.A. informant.

From Los Angeles Times ● Jun. 28, 2025

Photographers snapped the president holding up the outward-facing index card during a brief press availability in the Roosevelt Room to kick off the meeting.

From Washington Times ● Jun. 24, 2022

That evening, entirely unexpectedly, my mom texted me a photo of an index card with a handwritten recipe for pita bread: "Gram's pita recipe in her own handwriting. Just discovered it in my Lebanese cookbook!"

From Salon ● Mar. 18, 2022

An hour later, when we’re both done packing an overnight bag, I make a sign on a large index card and ask Dad to tape it to my back.

From "Please Ignore Vera Dietz" by A.S. King