Standard Lemma guide

epiphenomenon

noun · 4 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

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.

  • Received-Pronunciation: /ˌɛpɪfəˈnɒmɪnən/
  • Received-Pronunciation: /-fɪ-/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • General-American: /ˌɛpəfəˈnɑməˌnɑn/
  • General-American: /-nən/
  • Received-Pronunciation: /ˌɛpɪfəˈnɒmɪnə/
  • General-American: /ˌɛpəfəˈnɑmənə/

1

noun

Meaning 1

An activity, process, or state that is the result of another; a by-product, a consequence.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: by-product, unintended consequence, side effect

Antonyms: none provided

2

noun

Meaning 2

A mental process or state that is an incidental by-product of physiological events in the brain or nervous system.

Definition source: English Wiktionary via Wiktextract

Topics: human-sciences, philosophy, psychology, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

A symptom that develops during the course of a disease that is not connected to the disease.

Definition source: English Wiktionary via Wiktextract

Topics: medicine, pathology, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

a secondary phenomenon that is a by-product of another phenomenon

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: by-product, byproduct

History

Etymology

PIE word *h1epi Etymology tree Proto-Indo-European *h1ep-der. Proto-Indo-European *h1épsder. Proto-Indo-European *h1epi Proto-Hellenic *epí Ancient Greek ἐπί (epí) Ancient Greek ἐπῐ- (epĭ-)der. English epi- Proto-Indo-European *bheh2-der. Proto-Hellenic *pháňňō Ancient Greek φαίνω (phaínō) Ancient Greek φαινόμενον (phainómenon)bor. Late Latin phaenomenonder. English phenomenon English epiphenomenon From epi- (prefix meaning ‘above, on, over; in addition to’) + phenomenon. Phenomenon is derived from Late Latin phaenomenon (“appearance”), from Ancient Greek φαινόμενον (phainómenon, “thing that appears in one’s view; appearance; phenomenon”), a noun use of the neuter singular form of φαινόμενος (phainómenos), the present middle or passive participle of φαίνω (phaínō, “to cause to appear; to reveal, show, uncover; to expound”), ultimately from Proto-Indo-European *bheh2- (“to glow with light, to shine”).

Across languages

Translations

45 source translations are retained for this English entry.

  • Chinese Mandarin: 附帶現象 /附带现象 (fùdàixiànxiàng) — activity, process, or state, process or other activity that is the result of another — see also by-product, consequence
  • Chinese Mandarin: 副現象 /副现象 (fùxiànxiàng) — activity, process, or state, process or other activity that is the result of another — see also by-product, consequence
  • Chinese Mandarin: 偶發現象 /偶发现象 (ǒufāxiànxiàng) — activity, process, or state, process or other activity that is the result of another — see also by-product, consequence
  • Dutch: epifenomeen — activity, process, or state, process or other activity that is the result of another — see also by-product, consequence
  • Dutch: afgeleid gegeven — activity, process, or state, process or other activity that is the result of another — see also by-product, consequence
  • Finnish: sivutuote — activity, process, or state, process or other activity that is the result of another — see also by-product, consequence
  • French: épiphénomène — activity, process, or state, process or other activity that is the result of another — see also by-product, consequence
  • Greek: επιφαινόμενο (epifainómeno) — activity, process, or state, process or other activity that is the result of another — see also by-product, consequence
  • Icelandic: fylgifyrirbæri — activity, process, or state, process or other activity that is the result of another — see also by-product, consequence
  • Northern Kurdish: berkarîgerî — activity, process, or state, process or other activity that is the result of another — see also by-product, consequence
  • Northern Kurdish: bertesîrî — activity, process, or state, process or other activity that is the result of another — see also by-product, consequence
  • Polish: epifenomen — activity, process, or state, process or other activity that is the result of another — see also by-product, consequence
  • Basque: epifenomeno — metal process or state that is an incidental by-product of physiological events in the brain or nervous system
  • Catalan: epifenomen — metal process or state that is an incidental by-product of physiological events in the brain or nervous system
  • Chinese Mandarin: 附帶現象 /附带现象 (fùdàixiànxiàng) — metal process or state that is an incidental by-product of physiological events in the brain or nervous system
  • Czech: epifenomén — metal process or state that is an incidental by-product of physiological events in the brain or nervous system
  • Dutch: epifenomeen — metal process or state that is an incidental by-product of physiological events in the brain or nervous system
  • Dutch: bijverschijnsel — metal process or state that is an incidental by-product of physiological events in the brain or nervous system
  • Esperanto: epifenomeno — metal process or state that is an incidental by-product of physiological events in the brain or nervous system
  • Estonian: epifenomen — metal process or state that is an incidental by-product of physiological events in the brain or nervous system
  • Estonian: kaasnähtus — metal process or state that is an incidental by-product of physiological events in the brain or nervous system
  • Finnish: epifenomeeni — metal process or state that is an incidental by-product of physiological events in the brain or nervous system
  • Finnish: seurannaisilmiö — metal process or state that is an incidental by-product of physiological events in the brain or nervous system
  • French: épiphénomène — metal process or state that is an incidental by-product of physiological events in the brain or nervous system
  • German: Epiphänomen — metal process or state that is an incidental by-product of physiological events in the brain or nervous system
  • German: Begleiterscheinung — metal process or state that is an incidental by-product of physiological events in the brain or nervous system
  • Greek: επιφαινόμενο (epifainómeno) — metal process or state that is an incidental by-product of physiological events in the brain or nervous system
  • Icelandic: aukageta — metal process or state that is an incidental by-product of physiological events in the brain or nervous system
  • Icelandic: fylgifyrirbæri — metal process or state that is an incidental by-product of physiological events in the brain or nervous system
  • Italian: epifenomeno — metal process or state that is an incidental by-product of physiological events in the brain or nervous system
  • Kazakh: эпифеномен (épifenomen) — metal process or state that is an incidental by-product of physiological events in the brain or nervous system
  • Kyrgyz: эпифеномен (epifenomen) — metal process or state that is an incidental by-product of physiological events in the brain or nervous system
  • Polish: epifenomen — metal process or state that is an incidental by-product of physiological events in the brain or nervous system
  • Portuguese: epifenómeno — metal process or state that is an incidental by-product of physiological events in the brain or nervous system
  • Portuguese: epifenômeno — metal process or state that is an incidental by-product of physiological events in the brain or nervous system
  • Russian: эпифеномен (epifenomen) — metal process or state that is an incidental by-product of physiological events in the brain or nervous system
  • Slovak: epifenomén — metal process or state that is an incidental by-product of physiological events in the brain or nervous system
  • Spanish: epifenómeno — metal process or state that is an incidental by-product of physiological events in the brain or nervous system
  • Swedish: epifenomen — metal process or state that is an incidental by-product of physiological events in the brain or nervous system
  • Ukrainian: епіфено́мен (epifenómen) — metal process or state that is an incidental by-product of physiological events in the brain or nervous system
  • Dutch: epiphenomena — symptom that develops during the course of a disease that is not connected to the disease
  • French: épiphénomène — symptom that develops during the course of a disease that is not connected to the disease
  • Greek: επιφαινόμενο (epifainómeno) — symptom that develops during the course of a disease that is not connected to the disease
  • Icelandic: fylgifyrirbæri — symptom that develops during the course of a disease that is not connected to the disease
  • Polish: epifenomen — symptom that develops during the course of a disease that is not connected to the disease