| On base percentage | On-base plus slugging | On-sight climbing |
| One-time pad | Ontario | Ontology |
| On-topicSomething is on-topic if it is within the bounds of the current discussion. This term is normally used in the context of mailing lists, discussion groups, bulletin boards and newsgroups, all of which are generally established for the discussion of specifi | Ontario Swine ImprovementOntario Swine Improvement is a company based in Ontario, Canada for the improvement (and breeding) of swine or pigs. External links Companies of Canada. | Online Book InitiativeLike Project Gutenberg, the Online Book Initiative is a project to collect and make available freely-redistributable texts. External links http://ftp. com/obi/ Digital libraries. |
| Ontological argumentIn theology, an ontological argument for the existence of God was first proposed by the medieval philosopher Saint Anselm in Chapter 2 of his Proslogion. Ontology as a philosophical sub-discipline is concerned with the nature of being. While Anselm himsel | OntogenyOntogeny (also ontogenesis or morphogenesis) describes the origin and the development of an organism from the fertilized egg to its mature form. Ontogeny is studied in developmental biology. The idea that ontogeny recapitulates phylogeny, i. that the deve | OnomatopoeiaIn linguistics and poetry, onomatopoeia is the device of a word, or occasionally, a grouping of words, with a sound imitating the sound it is describing, such as "bang", "click", "fizz", "hush". For animals, the following words are typically used in Engli |
| One Foot in the GraveOne Foot in the Grave is both a television situation comedy (see below) and a 1994 album by Beck (see One Foot in the Grave (album . One Foot in the Grave was a popular BBC television situation comedy series, or " Britcom", written by David Renwick. It ca | OncogeneAn oncogene is a gene that can cause a cell to develop into a tumor cell, possibly resulting in cancer. Protooncogene A proto''oncogene is a gene that is involved in signal transduction and execution of mitogenic signals, usually through its protein produ | Online computations and algorithmsA common approach in computer science to problem solving is offline computation. This means that the whole problem data is given from the beginning and one is required to output an answer which solves the problem in hand. Other problems, however, are onli |
| On Fairy-Stories | Ontogeny and phylogeny | One-day cricket |
| On War | One pair (poker) | One player to a hand |
| One World Trade Center tenants | One-way trunk | On-hook |
| On-premises wiring | On-the-air | Oneida Society |
| On the Waterfront | One-child policy | One Flew Over the Cuckoo's Nest |
| Ontology (computer science) | Onion | Ontological commitment |
| Ontario County, New York | Oneida County, New York | Onondaga County, New York |
| One Hour with You | One Night of Love | One Hundred Men and a Girl |
| One Ring | On Writing | One country, two systems |
| Oncology | One-China policy | On Deadly Ground |
| Ono | Onesimus | Oneonta |
| Onoe Saishu | One Foot in Heaven | Oneiroi |
| One Minute Silence | One Nation Party | Ontario (disambiguation) |
| One-line fix | Ono pacakoti | Oneida County, Wisconsin |
| Onslow County, North Carolina | Ontonagon County, Michigan | Oneida County, Idaho |
| Oneonta, Alabama | Onkaparinga River National Park | One for the Angels |
| Onycha, Alabama | Oncotic pressure | On Golden Pond |
| Onyx, California | Ontario, California | Onaway, Idaho |
| Onarga, Illinois | Oneida, Illinois | Onward, Indiana |
| Onslow, Iowa | Onawa, Iowa | Oneida, Kansas |
| Onaga, Kansas | Onset, Massachusetts | Onota Township, Michigan |
| Ontwa Township, Michigan | Oneida Charter Township, Michigan | Onondaga Township, Michigan |
| Onsted, Michigan | Onekama, Michigan | Onekama Township, Michigan |
| Onderbanken | Ontonagon, Michigan | Ontonagon Township, Michigan |
| Onaway, Michigan | Onamia, Minnesota | Onamia Township, Minnesota |
| Onstad Township, Minnesota | One Nation Under a Groove | Ong, Nebraska |
| One Nation | Oneida, New York | Oneida Castle, New York |
| Onondaga, New York | Ontario, New York | Ontario, Ohio |
| Ontario, Oregon | Ontelaunee Township, Pennsylvania | Oneida Township, Pennsylvania |
| One Wild Night Live 1985-2001 | Oneida, Pennsylvania | Onaka, South Dakota |
| Onida, South Dakota | Oneida, Tennessee | Onalaska, Texas |
| Onion Creek, Texas | Onancock, Virginia | Onley, Virginia |
| Oneida (town), Wisconsin | Ontario, Wisconsin | Onager |
| Onomastics | Onigiri | One-hit wonder |
| Onondaga Reservation, New York | Oneida, Wisconsin | One-piece garment |