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BismuthicBismuthiferous
Bismuthine
Bismuthous
Bismuthyl
Bison
Bison bison
Bison bonasus
Bison++
bisontine
BISP
Bispinose
Bisque
Bissau
Bissell truck
Bissextile
-- bissextile day --
bissextile year
BISSI
Bisson
BIST
Bister
bistered
Bistipuled
Bistort
Bistoury
Bistre
bistred
bistro
bistroic
Bisulcate
Bisulcous
Bisulphate
bissextile day
| Noun | 1. |  bissextile day - the name of the day that is added during a leap yearSynonyms: February 29, leap day |