binus

Probably from bis (“twice”) +‎ -īnus.

• (Classical) IPA^(key): /ˈbiː.nus/, [ˈbiːnʊs̠]
• (modern Italianate Ecclesiastical) IPA^(key): /ˈbi.nus/, [ˈbiːnus]

bīnus (feminine bīna, neuter bīnum); first/second-declension adjective

1. occurring twice, twofold, double, binary
2. (chiefly plural) in pairs
3. (chiefly plural) two each
   • 27 BCE – 25 BCE, Titus Livius, Ab Urbe Condita 26.1:

     Et praetoribus prioris anni M. Iunio in Etruria, P. Sempronio in Gallia cum binis legionibus quas habuerant prorogatum est imperium.

     […] And the military command of Marcus Junius in Etruria and Publius Sempronius in Gaul, praetors of the previous year, was extended with the two legions which they had each held.

Cicero notes that in his time bīnī was avoided among educated speakers due to its similarity to the obscene Ancient Greek word βινεῖν (bineîn, “to fuck”).[1]

First/second-declension adjective.

• bīnārius
• binō (Medieval Latin)
• combīnō

• “binus”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• binus in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette
• Carl Meißner; Henry William Auden (1894) Latin Phrase-Book‎, London: Macmillan and Co.
  • (ambiguous) to be absolutely ignorant of arithmetic: bis bina quot sint non didicisse
    
  • (ambiguous) to lend at 24 per cent.[TR1: binis centesimis fenerari
    
• “binary”, in The Century Dictionary […], New York, N.Y.: The Century Co., 1911, →OCLC.