ɪn dʒiˈɑːmətɹi, ɐ spˈɪɹɪk sˈɛkʃən, sˈʌmtaɪmz kˈɔːld ɐ spˈɪɹɪk ʌv pˈɜːsɪəs, ɪz ɐ kwˈɔːɹɾɪk plˈeɪn kˈɜːv dᵻfˈaɪnd baɪ ᵻkwˈeɪʒənz ʌvðə fˈɔːɹm
In geometry, a spiric section, sometimes called a spiric of Perseus, is a quartic plane curve defined by equations of the form