index card

American  

noun

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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Etymology

Origin of index card

First recorded in 1925–30

Example Sentences

Lincoln Riley’s game plan probably couldn’t fit on anything more than an index card.

From Los Angeles Times • Oct. 28, 2023

I’m more focused when taking a moment to jot something down, whether it’s making a to-do list and outline in my notebook or creating an up-to-the-minute morning routine on an index card.

From The Verge • Aug. 3, 2022

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

Leave prompts on an index card, even, by your favorite phone chair.

From Washington Post • Mar. 20, 2022

There was a blur of hands as the four men made moves on a chess set hardly larger than an index card.

From "Endgame" by Frank Brady