RADIATIO OPTICA

\ɹˌe͡ɪdɪˈe͡ɪʃɪˌə͡ʊ ˈɒptɪkə], \ɹˌe‍ɪdɪˈe‍ɪʃɪˌə‍ʊ ˈɒptɪkə], \ɹ_ˌeɪ_d_ɪ__ˈeɪ_ʃ_ɪ__ˌəʊ ˈɒ_p_t_ɪ_k_ə]\

Definitions of RADIATIO OPTICA