Phrase guide

mass defect

noun · 2 senses · updated from the 2026-07-25 local source snapshot

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

Pronunciation

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No pronunciation record was provided for this word.

1

noun

Meaning 1

the difference between the mass of an atom and the sum of the masses of its individual components in the free state; equivalent to the binding energy

Definition source: English Wiktionary via Wiktextract

Topics: natural-sciences, physical-sciences, physics

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

the amount by which the mass of an atomic nucleus is less than the sum of the masses of its constituent particles

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: mass deficiency

Antonyms: none provided

Broader terms: mass

History

Etymology

No etymology was provided for this word.

Across languages

Translations

7 source translations are retained for this English entry.

  • Finnish: massavaje — difference between the mass of an atom and that of its components
  • Finnish: massavajaus — difference between the mass of an atom and that of its components
  • German: Massendefekt — difference between the mass of an atom and that of its components
  • Hindi: द्रव्यमान क्षति (dravyamān kṣati) — difference between the mass of an atom and that of its components
  • Hindi: द्रव्यमान दोष (dravyamān doṣ) — difference between the mass of an atom and that of its components
  • Indonesian: defek massa — difference between the mass of an atom and that of its components
  • Swedish: massdefekt — difference between the mass of an atom and that of its components