Correct spelling for the English word "phrynin" is [fɹˈa͡ɪnɪn], [fɹˈaɪnɪn], [f_ɹ_ˈaɪ_n_ɪ_n] (IPA phonetic alphabet).
A substance contained in the skin secretion of the toad which is an intense irritant of the mucous membranes.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.