Phrase guide
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
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noun
A battery used to heat the filament or cathode heaters of electron tubes.
Definition source: English Wiktionary via Wiktextract
Usage: dated
Topics: business, electrical-engineering, electricity, electromagnetism, electronics, energy, engineering, natural-sciences, physical-sciences, physics
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
the battery used to heat the filaments of a vacuum tube
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
Broader terms: battery, electric battery
History
No etymology was provided for this word.
Across languages
2 source translations are retained for this English entry.
