19-letter words containing g, l, y, n
- underground trolley — See under trolley (def 4).
- valley of the kings — a valley on the west bank of the Nile near the site of Thebes: the necropolis of many of the kings and queens of the 18th and 19th dynasties of ancient Egypt, c1350–c1200 b.c.
- wearable technology — a small computer or advanced electronic device that is worn or carried on the body: the trendiest wearable technologies.
- with flying colours — If you pass a test with flying colours, you have done very well in the test.
- 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.
- yellow-dog contract — a contract between a worker and an employer in which, as a condition of employment, the worker agrees not to remain in or join a union.
- yellowtail kingfish — a large carangid game fish, Seriola grandis, of S Australian waters
- yourdon methodology — (programming) The software engineering methodology developed by Edward Yourdon and colleagues in the 1970s and 1980s. "Yourdon methodology" is a generic term for all of the following methodologies: Yourdon/Demarco, Yourdon/Constantine, Coad/Yourdon.