Of a number, not divisible by two.
From M.E. odde, from O.N. oddi "odd (number)."
Tâq, related to tak "single, alone", from Mid.Pers. tak, tâg "single, alone," maybe related to tâi, tâ "unit, piece."
Fr.: noyau impair-pair
Nucleus which contains an odd number of protons and an even number of neutrons.
Fr.: noyau impair-impair
Nucleus which contains an odd number of both protons and neutrons.