What does nixie mean?
A nixie is chiefly a cold-cathode, gas-filled vacuum tube capable of displaying one numeral or alphanumeric character. When the appropriate electrode was activated, the selected character glowed brightly inside the tube while the others remained dark. These devices were widely used in counters, calculators, digital clocks, and other early electronic equipment before being largely displaced by seven-segment displays and LEDs. The word also survives in vulgar English slang for the external female genitalia, a use restricted by register and unsuitable for formal writing. Today, nixie is encountered most often in discussions of vintage electronics, computer history, and retro clock design, while “nixie display” may refer more broadly to an array of such tubes. The technical term is international in use, even though the word is especially familiar in Britain and the United States. It is a distinctive example of vocabulary that preserves the atmosphere of an earlier technological era.
nounA cold-cathode, gas-filled vacuum tube used to display a numeral or alphanumeric character. The word can also be crude informal slang for the external female genitalia.
- A cold-cathode, gas-filled vacuum tube in which one numeral or alphanumeric character glows when the corresponding electrode is activated.
- Crude informal slang for the external female genitalia.
"Each glowing nixie displayed one digit of the workshop clock."
"Each glowing nixie displayed one digit of the workshop clock."
"The joke used nixie as crude slang for female genitalia, and the room immediately fell silent."
The regular plural refers to multiple display tubes; the slang anatomical sense is rarely pluralized.
"A row of nixies formed the counter's glowing numerical display."
Before seven-segment LEDs, a nixie made one digit glow at a time—and gave clock lovers the warm electric glow still prized today.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does nixie come from?
The English technical term is associated with the mid-20th-century development of gas-filled numeric display tubes. The precise origin of the name “Nixie” is uncertain, so acronym-style explanations should be treated cautiously. From that technological use developed standard compounds such as “nixie tube” and “nixie display”; the separate vulgar slang sense also has no securely established etymology.
Related word forms
How nixie is actually used
In technical English, the noun is normally used attributively, especially in standard compound terms. The slang sense is vulgar or coarse and is unsuitable for formal, polite, or respectful contexts.
Easily confused with nixie
A nixie is an electronic display tube, whereas a nix is traditionally a water spirit and, as a verb, means to reject or cancel something.