homo

https://doi.org/10.1351/goldbook.H02838
  1. An acronym for Highest Occupied Molecular Orbital (HOMO).
    See: frontier orbitals
  2. A prefix (consisting of lower case letters, homo), used to indicate a higher homologue of a compound.
    Source:
    PAC, 1994, 66, 1077. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)' on page 1121 (https://doi.org/10.1351/pac199466051077)
  3. homo- Affix used to denote a ring expansion by inclusion of a methylene group into a ring-sector.
Source:
Blue Book, p. 500 (http://www.acdlabs.com/iupac/nomenclature/)