Definition: 7.07: Odd Number
And an odd number is one (which can)not (be) divided in half, or which differs from an even number by a unit.
Modern Definition
see odd number.
Mentioned in:
Chapters: 1
Corollaries: 2
Definitions: 3 4
Problems: 5 6
Proofs: 7 8 9 10 11 12 13 14 15 16 17 18
Propositions: 19 20 21 22 23 24 25 26 27 28
Sections: 29
Solutions: 30 31
Thank you to the contributors under CC BYSA 4.0!
 Github:

 nonGithub:
 @Fitzpatrick
References
Adapted from (subject to copyright, with kind permission)
 Fitzpatrick, Richard: Euclid's "Elements of Geometry"
Adapted from CC BYSA 3.0 Sources:
 Prime.mover and others: "Pr∞fWiki", https://proofwiki.org/wiki/Main_Page, 2016