GTC
Abbreviation with 2 meanings
| Stands for | Generalized tonic-clonic seizure |
|---|---|
| Meanings | 2 |
| Categories | Medical, Business & Finance |
GTC has two meanings. It stands for Generalized tonic-clonic seizure (neurology) or Good 'til canceled (stock market & investing).
Meanings of GTC at a glance
| # | GTC stands for | Context |
|---|---|---|
| 1 | Generalized tonic-clonic seizure | Medical › Neurology |
| 2 | Good 'til canceled | Business & Finance › Stock Market & Investing |
1. Generalized tonic-clonic seizure
Medical · Neurology Abbreviations
Seizure involving both sides of the brain, with a stiffening (tonic) phase followed by rhythmic jerking (clonic) of all limbs, loss of consciousness, and often tongue biting and incontinence. Confusion and sleepiness afterward (the postictal state) can last minutes to hours.
Example: First GTC at age 19 after sleep deprivation; EEG shows generalized spike-wave discharges.
Previously called "grand mal" seizures, a term the International League Against Epilepsy no longer uses. Under the 2017 ILAE classification, a seizure that starts in one area and spreads is called focal to bilateral tonic-clonic. Uncontrolled GTC seizures are the strongest risk factor for SUDEP. Bystanders should time the seizure, turn the person on their side and not put anything in the mouth.
2. Good 'til canceled
Business & Finance · Stock Market & Investing Abbreviations
Order instruction that keeps a buy or sell order active until it is filled or the investor cancels it, rather than expiring at the end of the trading day. Most US brokers cap GTC orders at somewhere between 60 and 180 days.
Example: I placed a GTC limit order to buy at $42, well below today's price.
Also written good-till-canceled. Because GTC orders stay open for weeks, they can fill unexpectedly after an overnight price gap. The default alternative is a day order, which expires at the close if it is not filled.
Related abbreviations
More neurology abbreviations
- EVT – Endovascular thrombectomy
- FAST – Face, Arm, Speech, Time
- FTD – Frontotemporal dementia
- GBS – Guillain-Barré syndrome
- HA – Headache
- HD – Huntington's disease
- HIE – Hypoxic-ischemic encephalopathy
- HINTS – Head Impulse, Nystagmus, Test of Skew
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More stock market & investing abbreviations
- FPO – Follow-on public offering
- FTSE – Financial Times Stock Exchange
- GARP – Growth at a reasonable price
- GDR – Global depositary receipt
- HFT – High-frequency trading
- HKEX – Hong Kong Exchanges and Clearing
- ICE – Intercontinental Exchange
- IOC – Immediate or cancel
See all 110 stock market & investing abbreviations →
This entry is for general education and is not medical advice. Abbreviation use varies between institutions; always confirm in context.