# 1d

> English word · Noun · frequency rank #25,647

## Definitions
1. Abbreviation of one penny (a coin with the value of 1 pence/penny; 1/240th of a pound, in pre-decimalisation currency, never used for 'one new penny').

## Etymology
From 1 + d (“old penny”).

## Easily confused with
- **1st** (https://plainspell.com/en/vs/1d-vs-1st)
- **1v1** (https://plainspell.com/en/vs/1d-vs-1v1)
- **1** (https://plainspell.com/en/vs/1-vs-1d)

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/1d