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.
Sound
Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.
No pronunciation record was provided for this word.
noun
A physical force of attraction between very closely separated objects, due to random quantum fluctuations of the electromagnetic field in a vacuum; it is inversely proportional to the fourth power of the distance of separation
Definition source: English Wiktionary via Wiktextract
Topics: natural-sciences, physical-sciences, physics, quantum-field-theory
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
History
After Hendrik Casimir, Dutch physicist.
Across languages
2 source translations are retained for this English entry.
