Definition of senary in English:

senary

adjective

rare
  • Relating to or based on the number six:

    ‘in the binary scale only two characters are wanted, namely 1 and 0; in the senary, six; in the decimal, ten’
    • ‘Because six is the product of the first two prime numbers and is adjacent to the next two prime numbers, many senary fractions have simple representations.’
    • ‘Base 2 is called binary, Base 3 is called ternary, Base 4 is called quaternary, Base 5 is called quinary, Base 6 is called senary, Base 7 is called septenary, Base 8 is called octonary or octal.’

Origin

Late 16th century: from Latin senarius containing six, based on sex six.

Pronunciation:

senary

/ˈsiːnəri/