All articles starting with G
18,970 articles
Ground support equipment
Ground support equipment is the motorized and non-motorized vehicles used at airports to service aircraft during turnaround, including baggage tugs, belt loaders, fuel trucks, lavatory trucks, and pushback tractors.
Ground tissue
Ground tissue (fundamental tissue system) is the non-dermal, non-vascular tissue of vascular plants, made of parenchyma, collenchyma, and sclerenchyma; it fills space between dermal and vascular tissues and performs photosynthesis, storage, and support.
Ground truth
Ground truth is the ideally correct value or label against which a measurement or model output is judged, in measurement science and machine learning alike.
Ground Up
Ground Up is a six-part Australian ABC comedy (2026) created by Gary McCaffrie, starring Sam Pang as AFL administrator Hugh Shen establishing Tasmania's first AFL team and its taxpayer-funded stadium, directed by Wayne Hope for Gristmill.
Ground Vehicle Systems Center
The Ground Vehicle Systems Center (GVSC), known until 2019 as TARDEC, is the U.S. Army's research and development facility for ground vehicle technology in Warren, Michigan.
Ground wave
A ground wave is a radio wave that travels along or near the Earth's surface without reflection from the ionosphere, letting AM stations reach beyond the visual horizon.
Ground Zero (2025 film)
Ground Zero (2025) is a Hindi action film directed by Tejas Prabha Vijay Deoskar, starring Emraan Hashmi as BSF officer Narendra Nath Dhar Dubey hunting 2001 Parliament attack mastermind Ghazi Baba; released 25 April 2025 by Excel Entertainment.
Ground-Based Midcourse Defense
Ground-Based Midcourse Defense (GMD) is the United States' sole system for destroying incoming ICBM warheads by direct collision in space, deployed since 2004 with 44 interceptors in Alaska and California.
Ground-effect vehicle
A ground-effect vehicle, formally called a wing-in-ground (WIG) craft, flies close above water for extra lift, carrying more weight farther than aircraft; the Soviet Union's large versions were called ekranoplans.
Ground-glass opacity
Ground-glass opacity (GGO), also called ground-glass nodule when focal, is a hazy CT lung finding with visible vessels, caused by infection (including COVID-19), inflammation, hemorrhage, or adenocarcinoma-spectrum cancer; managed by multi-year surveillance, PET having low sensitivity.
Ground-like domain
Ground-like domain (Pfam PF04155, InterPro IPR007284): a cysteine-rich protein domain of nematode hedgehog-like (grl) proteins, named after C. elegans Groundhog genes, proposed to modulate Patched-like membrane proteins.
Ground-penetrating radar
Ground-penetrating radar (GPR), or georadar, is a nondestructive geophysical method that transmits radio-frequency pulses into the ground and records reflections to map buried features and their depths.
Ground-source heat pump
A ground-source heat pump (GSHP), also called a geothermal heat pump, is a heating and cooling system that exchanges heat with the ground through buried pipes.
Ground-state cooling of a micromechanical oscillator
Ground-state cooling of a micromechanical oscillator is the cooling of a microfabricated mechanical resonator below one phonon of thermal motion, chiefly by sideband cooling, first demonstrated at NIST in 2011.
Ground–structure interaction in tunnelling
Ground–structure interaction in tunnelling is the study of how tunnelling-induced ground movements affect adjacent buildings, bridges, and existing tunnels, and how structure stiffness modifies those movements.
Groundbreaking
Groundbreaking ceremony: a symbolic ritual marking the official start of construction, also called sod-turning; participants turn first soil with ceremonial shovels, contrasting with the ribbon-cutting that marks completion.
Grounded (video game)
Grounded (video game): Obsidian Entertainment survival crafting game (Xbox Game Studios) where shrunken teens survive a giant-insect backyard; early access July 2020, 1.0 September 2022; sequel Grounded 2 in 2025; arachnophobia safe mode.
Grounded 2
Grounded 2 is Obsidian Entertainment and Eidos-Montréal's co-op survival sequel to Grounded, in Xbox Game Preview and Steam Early Access since July 29, 2025 ($29.99), set in Brookhollow Park with rideable Buggy insect mounts, on Game Pass day one, and on PlayStation 5 from August 11, 2026.
Grounded for Life
Grounded for Life is an American sitcom created by Bill Martin and Mike Schiff for Carsey-Werner, airing 2001–2005 on Fox then The WB, about the Irish Catholic Finnerty family of Staten Island raising three kids after a teen pregnancy.
Grounded Language-Image Pre-training (GLIP)
Grounded Language-Image Pre-training (GLIP) is a vision-language model from Microsoft Research, introduced in December 2021, that unifies object detection and phrase grounding in one task.
Grounded theory
Grounded theory is a qualitative research methodology that generates theories inductively from systematically collected data. Barney Glaser and Anselm Strauss developed it in the 1960s.
Groundhog
Groundhog (Marmota monax), also called woodchuck or whistlepig: a large burrowing squirrel-family rodent of eastern North America and Canada, a hibernator, hepatitis B research model, and the animal of Groundhog Day.
Groundhog Day
Groundhog Day, also called Daks Day, is a North American folk custom on February 2 in which a groundhog's shadow is said to predict winter's length.
Groundhog Day (film)
Groundhog Day is a 1993 Harold Ramis comedy starring Bill Murray as weatherman Phil Connors, trapped reliving February 2 in Punxsutawney, Pennsylvania; the Danny Rubin-scripted Columbia film founded the time-loop genre.
Groundhog Day (musical)
Groundhog Day is a 2016 stage musical based on the 1993 film, with book by Danny Rubin, music and lyrics by Tim Minchin, directed by Matthew Warchus. Premiered at London's Old Vic, it won the Olivier Award for Best New Musical, ran on Broadway in 2017 with Tony nominations, and its 2023 Old Vic revival became the theatre's highest-grossing production.
Groundhogs (The Bear)
"Groundhogs" is the season 4 premiere of The Bear, written and directed by Christopher Storer, aired June 25, 2025 on Hulu; Carmy faces a 1,400-hour countdown to save the restaurant after a negative Chicago Tribune review.
Grounding DINO
Grounding DINO is an open-set object detection model developed by IDEA Research and introduced on arXiv in 2023, combining the DINO detector with language to detect arbitrary objects described by text prompts.
Grounding line
A grounding line is the boundary where a glacier or ice sheet resting on bedrock loses contact with the ground and starts to float on seawater as an ice shelf or floating tongue.
Groundnut trade in Senegambia
The groundnut trade in Senegambia was the export of peanuts from the Senegal and Gambia river regions, beginning in the 1830s and becoming West Africa's dominant cash-crop economy under French and British colonial rule.
Grounds for divorce (United States)
Grounds for divorce in the United States are fault grounds (adultery, cruelty, abandonment) or no-fault grounds (irreconcilable differences, irretrievable breakdown). All 50 states offer no-fault divorce after California's 1969 Family Law Act; 33 states retain fault grounds, 17 allow no-fault only.