GC
Abbreviation with 9 meanings
| Stands for | Gonococcus (gonorrhea) |
|---|---|
| Meanings | 9 |
| Categories | Medical, Science & Engineering, Law & Legal, Texting & Internet Slang, Technology & Computing, Military, Sports |
GC has nine meanings. The most common are Gonococcus (gonorrhea) (infectious disease) and Gas chromatography (chemistry); it can also stand for General counsel, Group chat, Guanine-cytosine (content), Garbage collection and George Cross, plus 2 more listed below.
Meanings of GC at a glance
| # | GC stands for | Context |
|---|---|---|
| 1 | Gonococcus (gonorrhea) | Medical › Infectious Disease |
| 2 | Gas chromatography | Science & Engineering › Chemistry |
| 3 | General counsel | Law & Legal › Legal Profession |
| 4 | Group chat | Texting & Internet Slang › Texting and Chat |
| 5 | Guanine-cytosine (content) | Science & Engineering › Genetics |
| 6 | Garbage collection | Technology & Computing › Programming |
| 7 | George Cross | Military › Military Award and Decoration |
| 8 | General classification | Sports › Other Sports |
| 9 | Glucocorticoid | Medical › Drug Class |
1. Gonococcus (gonorrhea)
Medical · Infectious Disease Abbreviations
Clinical shorthand for Neisseria gonorrhoeae, the bacterium that causes gonorrhea, an STI of the urethra, cervix, rectum and throat. US guidelines treat uncomplicated infection with a single 500 mg intramuscular dose of ceftriaxone because resistance to other drugs has spread.
Example: GC/CT NAAT positive for GC; ceftriaxone 500 mg IM given in clinic, partner notified.
Gonorrhea has developed resistance to every antibiotic class used against it, including penicillin, tetracyclines and fluoroquinolones, making it a CDC urgent threat. Untreated infection can cause pelvic inflammatory disease and infertility. Lab orders commonly pair "GC/CT" for gonorrhea and chlamydia. The slang term "the clap" is centuries old.
2. Gas chromatography
Science & Engineering · Chemistry Abbreviations
Separation technique in which a vaporized sample is carried by an inert gas, usually helium, hydrogen or nitrogen, through a long thin column inside an oven. Compounds emerge at different retention times depending on volatility and interaction with the column coating, which suits GC to fuels, fragrances, solvents and blood-alcohol testing.
Example: Residual solvents were determined by headspace GC with flame ionization detection.
Archer Martin and Anthony James introduced gas-liquid chromatography in 1952, the same year Martin shared the Nobel Prize in Chemistry with Richard Synge for partition chromatography. Common detectors are the flame ionization detector (FID), the thermal conductivity detector (TCD) and the mass spectrometer. GC works only for compounds that can be vaporized without decomposing.
3. General counsel
Law & Legal · Legal Profession Abbreviations · also used in business
Chief lawyer of a company, nonprofit, university or government agency, responsible for the organization's legal affairs, managing in-house lawyers and outside law firms, and advising executives and the board. In many companies the GC reports directly to the CEO.
Example: The GC must approve any settlement over $1 million and any change to the standard customer contract.
Large companies may give the role a C-suite title, chief legal officer (CLO). The GC often also serves as corporate secretary and oversees compliance. Communications with in-house counsel are privileged only when they seek or give legal rather than business advice. In chemistry, GC means gas chromatography.
4. Group chat
Texting & Internet Slang · Texting and Chat Abbreviations
Refers to a group conversation on apps such as iMessage, WhatsApp, Snapchat or Discord. People say "add me to the gc" or "drop it in the gc."
Example: Sending the hotel link in the gc so everyone can pay their share.
Widely used by Gen Z and millennials, often with its own etiquette, such as muting a noisy chat or starting a separate "gc without" one person. In gaming circles GC can mean the Nintendo GameCube, and in schools a guidance counselor, so context decides.
5. Guanine-cytosine (content)
Science & Engineering · Genetics Abbreviations
Proportion of bases in a DNA or RNA sequence that are guanine or cytosine, written as GC content or GC%. G-C pairs form three hydrogen bonds versus two for A-T, so GC-rich DNA melts at higher temperatures, which matters for designing PCR primers.
Example: Aim for primers with 40-60% GC and a melting temperature near 60 °C.
The human genome averages about 41% GC, while bacterial genomes range from below 20% to above 70%. GC content varies along chromosomes in large regions called isochores. In chemistry the same letters usually mean gas chromatography.
6. Garbage collection
Technology & Computing · Programming Abbreviations
Automatic memory management in which the runtime finds objects a program can no longer reach and frees their memory, so developers do not release memory by hand. Java, C#, Go, JavaScript and Python all rely on it.
Example: Latency spikes every few minutes line up with long GC pauses in the logs.
Invented by John McCarthy around 1959 for Lisp. Collectors use techniques such as mark-and-sweep, generational collection and reference counting; CPython combines reference counting with a cycle detector. Pauses can hurt latency, so modern collectors such as ZGC and G1 keep them very short. Rust avoids a garbage collector entirely through its ownership system.
7. George Cross
Military · Military Award and Decoration Abbreviations
Highest British award for gallantry not in the face of the enemy, for civilians and military personnel, ranking equal in precedence with the Victoria Cross.
Example: The bomb disposal officer received the GC for defusing a device under extreme danger.
King George VI created the award in 1940 during the Blitz. It has been awarded collectively twice: to the island of Malta in 1942 and to the Royal Ulster Constabulary in 1999. The cross appears on Malta's flag.
8. General classification
Sports · Other Sports Abbreviations
Overall standings in a multi-stage cycling race such as the Tour de France, based on cumulative time. The GC leader wears the yellow jersey in the Tour, the pink jersey in the Giro d'Italia and the red jersey in the Vuelta a Espana.
Example: He lost three minutes on the climb and dropped out of GC contention.
"GC riders" are team leaders aiming for the overall win, supported by domestiques. Time bonuses at finishes can also affect the GC. The yellow jersey has been used in the Tour since 1919.
9. Glucocorticoid
Medical · Drug Class Abbreviations
Steroid hormones and drugs such as cortisol, hydrocortisone, prednisone, methylprednisolone and dexamethasone that suppress inflammation and immune responses and affect glucose metabolism. They are used in hundreds of conditions, from asthma to cancer.
Example: GC-induced hyperglycemia: add NPH with morning prednisone dose.
Approximate equivalent doses are hydrocortisone 20 mg, prednisone 5 mg, methylprednisolone 4 mg and dexamethasone 0.75 mg. Long-term use causes osteoporosis, diabetes, cataracts, infections and adrenal suppression, so bone protection and gradual tapering are standard. In infectious disease GC more often means gonorrhea (gonococcus).
Related abbreviations
More infectious disease abbreviations
- EPT – Expedited partner therapy
- ESBL – Extended-spectrum beta-lactamase
- FUO – Fever of unknown origin
- GAS – Group A Streptococcus
- GNR – Gram-negative rods
- GPC – Gram-positive cocci
- H1N1 – Influenza A virus subtype H1N1
- H5N1 – Influenza A virus subtype H5N1
See all 92 infectious disease abbreviations →
More chemistry abbreviations
- EtOAc – Ethyl acetate
- ETOH – Ethanol (alcohol)
- EVA – Ethylene-vinyl acetate
- FTIR – Fourier-transform infrared spectroscopy
- GC-MS – Gas chromatography-mass spectrometry
- GHS – Globally Harmonized System of Classification and Labelling of…
- H2O – Water
- H2O2 – Hydrogen peroxide
See all 106 chemistry abbreviations →
This entry is for general education and is not medical or legal advice. Abbreviation use varies between institutions; always confirm in context.