http://rd.vernccvbvyi5qhfzyqengccj7lkove6bjot2xhh5kajhwvidqafczrad.onion/define.php?term=an%20abbreviation
Some become the standard forms, and the full forms are then regarded as formal or technical, for example, bus = omnibus , taxi = taxicab , deli = delicatessen, zoo = zoological garden. Sometimes shortenings are altered to facilitate their pronunciation or spelling: bike = bicycle2 Contractions are abbreviated forms in which letters from the middle of the full form have been omitted, for example, Dr. = doctor, St. = saint or street.