# Sheffer stroke

> English word · Noun

## Definitions
1. The vertical bar symbol ( | ), denoting the NAND operation.

## Etymology
After Henry M. Sheffer.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/sheffer-stroke