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
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.
/ˈfɛn.tə.nɪl/
also, sometimes:[ˈfɛnʔ.nɪɫ]
US:Recorded audio is listed in the source snapshot.
US, nonstandard:/ˈfɛn.tə.nɑl/
US, nonstandard:/ˈfɛn.tə.nɔl/
US, nonstandard:[ˈfɛnʔ.nɑɫ]
US, nonstandard:[ˈfɛnʔ.nɔɫ]
1
noun
Meaning 1
A synthetic opioid narcotic analgesic, C22H28N2O, with pharmacological action similar to morphine that is administered transdermally as a skin patch and in the form of its citrate, C22H28N2O·C6H8O7, is administered orally or parenterally (as by intravenous or epidural injection); N-phenyl-N-[1-(2-phenylethyl)piperidin-4-yl]propanamide.
Definition source: English Wiktionary via Wiktextract
Usage: countable, uncountable
Topics: medicine, pharmacology, sciences
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
2
noun
Meaning 2
trade names of a narcotic analgesic that can be inhaled and that acts on the central nervous system and may become addictive; used as a veterinary anesthetic and with other drugs before, during, and after surgery; also used as a nonlethal gas to incapacitate people in hostage situations; also abused as a recreational drug
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
