19-letter words that end in on
- transformer station — a station of an electricity generation, transmission and distribution system where voltage is transformed from high to low or the reverse using transformers
- tropical depression — an atmospheric low-pressure system originating in the tropics, specifically, a tropical cyclone in which the maximum sustained wind speed is 38 miles per hour (62 kilometers per hour) or less.
- under consideration — being deliberated
- underrepresentation — the act of representing.
- unlawful possession — possession of substances or items (such as drugs or guns) for which criminal sanctions exist because they may not be legally possessed or may not be possessed under certain circumstances
- vacuum distillation — a process of distillation employing a vacuum that by lowering the pressure on a liquid allows volatilization at a lower temperature than normal.
- velocity modulation — the modulation in velocity of a beam of electrons or ions caused by passing the beam through a high-frequency electric field, as in a cavity resonator
- wage-push inflation — an inflationary trend caused by wage increases that in turn cause rises in production costs and prices.
- wassermann reaction — a diagnostic test for syphilis using the fixation of a complement by the serum of a syphilitic individual.
- white-handed gibbon — a gibbon, Hylobates lar, inhabiting Thailand, the Malay Peninsula, and northern Sumatra, varying from black to light buff in color, and having white hands and feet: an endangered species.
- writ of prohibition — a command by a higher court that a lower court shall not exercise jurisdiction in a particular case.
- xenotransplantation — xenograft.
- yellow book, jargon — (publication) The print version of the Jargon File, titled "The New Hacker's Dictionary". It includes essentially all the material the File, plus a Foreword by Guy L. Steele, Jr. and a Preface by Eric S. Raymond. Most importantly, the book version is nicely typeset and includes almost all of the infamous Crunchly cartoons by the Great Quux, each attached to an appropriate entry. The first, second, and third editions correspond to versions 2.9.6, 3.0.0, and 4.0.0 of the File, respectively.
- yesterday afternoon — during the afternoon of the day preceding today
- zenithal projection — a type of map projection in which part of the earth's surface is projected onto a plane tangential to it, either at one of the poles (polar zenithal), at the equator (equatorial zenithal), or between (oblique zenithal)
- zone of illuviation — B horizon.