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Lettris
Lettris is a curious tetris-clone game where all the bricks have the same square shape but different content. Each square carries a letter. To make squares disappear and save space for other squares you have to assemble English words (left, right, up, down) from the falling squares.
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English dictionary
Main references
Most English definitions are provided by WordNet .
English thesaurus is mainly derived from The Integral Dictionary (TID).
English Encyclopedia is licensed by Wikipedia (GNU).
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definitions
synonyms
semantic net
anagrams
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Le Littré
Ebay
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bissexte (n.m.)
1.(vieux)jour supplémentaire de février.
bissexte (adj.)
1.se dit de l'année qui a un 366ème jour le 29 février et qui revient toutes les années divisibles par quatre.
bissexte (adj.)
bissexte (n.m.)
BISSEXTE (s. m.)
Jour ajouté tous les quatre ans au mois de février. On aura bissexte cette année.
HISTORIQUE
XIIIe s.— Julles Cesar, li premiers empereres de Rome, qui moult sot de letres, trova le jor de byssexte (Comput, f° 1)
ÉTYMOLOGIE
Bisextus, de bis, deux (voy. BIS), et sextus, sixième, de sex, six (voy. SIX). Jour ainsi nommé parce que, s'intercalant tous les quatre ans après le 24e jour de février, on comptait pour la deuxième fois le sixième jour avant les calendes de mars, c'est-à-dire que, le 24 février étant nommé le sixième jour avant les calendes de mars, le 25 était nommé le bis-sixième.