Noun
odd number (plural odd numbers)
(mathematics) Any integer that produces a noninteger when divided by two
The steps in front must be arranged so that there shall always be an odd number of them; for thus the right foot, with which one mounts the first step, will also be the first to reach the level of the temple itself. Vitruvius
If the immortal is also imperishable, the soul when attacked by death cannot perish; for the preceding argument shows that the soul will not admit of death, or even be dead, any more than three or the odd number will admit of the even... Socrates
There is a simple rule for composite objects, such as nuclei or atoms. The rule is that if such an object contains an odd number of fermions, the composite object is a fermion. Otherwise, it is a boson. ...this simple rule doesn't care at all about the number of bosons in the composite object. Frank Wilczek
In Vegas, I got into a long argument with the man at the roulette wheel over what I considered to be an odd number. Steven Wright
The eggs of the brood need to be an odd number. Sicilian Proverb
A general reflection may be expressed as the composite of any odd number of single-axis reflections. Source: Internet