sˈiːmoːɹ dʒˈɑːnəθən sˈɪŋɚ mˈeɪ twˈɛnti θɹˈiː, nˈaɪntiːnhˈʌndɹɪd twˈɛnti fˈoːɹ fˈɛbɹuːˌɛɹi tˈuː, tˈuː θˈaʊzənd sˈɛvəntˌiːn wʌz ɐn ɐmˈɛɹɪkən sˈɛl baɪˈɑːlədʒˌɪst ænd pɹəfˈɛsɚɹ ʌv baɪˈɑːlədʒi, ɪmˈɛɹɪɾəs, æt ðə jˌuːnɪvˈɜːsᵻɾi ʌv kˌælɪfˈoːɹniə, sˌæn dɪˈeɪɡoʊ.
Seymour Jonathan Singer (May 23, 1924 – February 2, 2017) was an American cell biologist and professor of biology, emeritus, at the University of California, San Diego.