Correct spelling for the English word "rod grannle" is [ɹˈɒd ɡɹˈanə͡l], [ɹˈɒd ɡɹˈanəl], [ɹ_ˈɒ_d ɡ_ɹ_ˈa_n_əl] (IPA phonetic alphabet).
The nucleus of a retinal cell connecting with one of the rods.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.