---
title: "BIP39 Word #240: bulb — Seed Phrase Mnemonic Word"
url: "https://bip39-phrase.com/bip39-word/bulb/"
language: "en"
updated: "2026-10-19T00:00:00+00:00"
---

Word #240 00011101111 

# bulb — BIP39 word #240

"**bulb**" is word #240 of the 2048 words in the official BIP39 English wordlist, between [build](/bip39-word/build/) and [bulk](/bip39-word/bulk/). In a seed phrase it stands for the 11-bit value `00011101111`, decimal index 239\. 

/bʌlb/  · _noun:_ the glass part of an electric lamp, or a rounded plant root 

[Russian](/ru/ "The BIP39 wordlist with Russian translations"): лампочка 

## Binary Representation

Seven 1-bits and four 0-bits; 330 of the 2048 indexes have exactly seven 1-bits.

One wrong bit turns it into (leftmost bit first):

[over](/bip39-word/over/)[fuel](/bip39-word/fuel/)[digital](/bip39-word/digital/)[assume](/bip39-word/assume/)[bicycle](/bip39-word/bicycle/)[boring](/bip39-word/boring/)[cable](/bip39-word/cable/)[brother](/bip39-word/brother/)[buddy](/bip39-word/buddy/)[buffalo](/bip39-word/buffalo/)[build](/bip39-word/build/) 

Position

Hex Index

0x0EF

4-Letter Prefix

bulb

## About "bulb" in BIP39

- It takes all four letters to identify "bulb": **"bul"** also begins [bulk](/bip39-word/bulk/) and [bullet](/bip39-word/bullet/).
- **"bulb"** is unique only within the English list: it also begins bulbo in the [Italian list](/italian/), so a four-letter backup should say which list it uses.

## Word #240 in the Other 9 BIP39 Wordlists

[Czech](/czech/) dnes 

[French](/french/) biotype 

[Italian](/italian/) bisesto 

[Japanese](/japanese/) えんぜつ 

[Korean](/korean/) 글자 

[Portuguese](/portuguese/) baiano 

[Spanish](/spanish/) besar 

[Traditional Chinese](/chinese-traditional/) 指 

[Simplified Chinese](/chinese-simplified/) 指 

## Similar Words — Check Carefully During Recovery

 One BIP39 word differs from "bulb" by just a single letter — the most common source of typos when a seed phrase is entered by hand: 

[bulk](/bip39-word/bulk/) 

Words sharing the first three letters "bul":

[bulk](/bip39-word/bulk/)[bullet](/bip39-word/bullet/) 

## More BIP39 Words Starting with "B"

[ #236 buddy ](/bip39-word/buddy/)[ #237 budget ](/bip39-word/budget/)[ #238 buffalo ](/bip39-word/buffalo/)[ #239 build ](/bip39-word/build/)[ #241 bulk ](/bip39-word/bulk/)[ #242 bullet ](/bip39-word/bullet/)[ #243 bundle ](/bip39-word/bundle/)[ #244 bunker ](/bip39-word/bunker/) 

[View all words starting with "B" ](/bip39-words/b/) 

## Seed phrase, key and recovery guides

- [Electrum Seed vs BIP39: Why Other Wallets Reject It](/electrum-seed-vs-bip39/)
- [Cold Sharding: Splitting a Private Key Into Offline Shamir Shares](/cold-sharding-method-private-key-storage-strategy/)
- [Test Your Wallet Backup: A Self-Audit of Your Seed Phrase](/hack-own-crypto-wallet/)

[ Full BIP39 Wordlist ](/)