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.
Received-Pronunciation:/ˈsɪs.təˌiːn/
Received-Pronunciation:/ˈsɪs.tə.ɪn/
Received-Pronunciation:/ˈsɪs.tiˌiːn/
Received-Pronunciation:/ˈsɪs.ti.ɪn/
General-American:/ˈsɪs.təˌin/
General-American:/ˈsɪs.tə.ɪn/
General-American:/ˈsɪs.tiˌin/
General-American:/ˈsɪs.ti.ɪn/
General-American:/ˈsɪˌstin/
Southern-England:Recorded audio is listed in the source snapshot.
rhymes with -ɪstin
1
noun
Meaning 1
A sulphur-containing nonessential amino acid C3H7NO2S found in most animal proteins; it readily oxidizes to cystine.
Definition source: English Wiktionary via Wiktextract