Pronunciation: [dɛltˈɪdɪəl] (IPA)
Correct spelling for the English word "deltidial" is [dɛltˈɪdɪəl], [dɛltˈɪdɪəl], [d_ɛ_l_t_ˈɪ_d_ɪ__ə_l] (IPA phonetic alphabet).