Correct spelling for the English word "gonycampsis" is [ɡˌɒnɪkˈampsɪs], [ɡˌɒnɪkˈampsɪs], [ɡ_ˌɒ_n_ɪ_k_ˈa_m_p_s_ɪ_s] (IPA phonetic alphabet).
Ankylosis or any abnormal curvature of the knee.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.