Word #736 01011011111

fossil — BIP39 word #736

"fossil" is word #736 of the 2048 words in the official BIP39 English wordlist, between forward and foster. In a seed phrase it stands for the 11-bit value 01011011111, decimal index 735.

/ˈfɒsᵊl/ · noun: the remains of an ancient animal or plant preserved in rock

Russian: ископаемый

Binary Representation

Eight 1-bits and three 0-bits; 165 of the 2048 indexes have exactly eight 1-bits.

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

swim brief know episode fault garment fly foot fork forum forward

Position

#736 of 2048

Hex Index

0x2DF

4-Letter Prefix

foss

About "fossil" in BIP39

"fossil" has 6 letters, but the first four, "foss", already identify it, because "fos" also begins foster.
"foss" is unique only within the English list: it also begins fossile in the French list, fosso in the Italian list and fossa in the Portuguese list, so a four-letter backup should say which list it uses.