bisextilis

• (Classical) IPA^(key): /biˈsek.sti.lis/, [bɪˈs̠ɛks̠t̪ɪlʲɪs̠]
• (modern Italianate Ecclesiastical) IPA^(key): /biˈsek.sti.lis/, [biˈs̬ɛkst̪ilis]

bisextilis (neuter bisextile); third-declension two-termination adjective

1. (relational) leap year, bissextile
   • 1553, Luminarum atque Planetarum motuum Tabulae octogina quinque, omnium ex his quae Alphonsum sequuntur quam faciles‎:

     Anni videlicet solares ex diebus 365 et quarta partes unius diei: quorum tres primi solum ex 365 diebus pro quolibet numerantur, qui non bissextiles dicuntur: quartus vero, ex 366 diebus componitur, et bissextilis nuncupatur.

     Every solar year is 365 and a quarter days: of these, each of the first three number 365 days, and they are called non-bissextiles, while the fourth, composed of 366 days, is called bissextile.

2. intercalary

Third-declension two-termination adjective.

• bisextus

• → Catalan: bissextil (learned)
• → English: bissextile
• → French: bissextil (learned)

• “bisextilis”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• bisextilis in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
• bisextilis in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.