Teliospore (sometimes called  teleutospore) is the thick-walled resting spore of some fungi (rusts and smuts), from which the basidium arises.
tˈɛlɪˌɑːspoːɹ sˈʌmtaɪmz kˈɔːld tˈɛlᵻjˌuːɾəspˌoːɹ ɪz ðə θˈɪkwˈɔːld ɹˈɛstɪŋ spˈoːɹ ʌv sˌʌm fˈʌŋɡi ɹˈʌsts ænd smˈʌts, fɹʌm wˈɪtʃ ðə beɪsˈɪdiəm ɚɹˈaɪzᵻz.