Correct spelling for the English word "cenosite" is [sˈɛnəsˌa͡ɪt], [sˈɛnəsˌaɪt], [s_ˈɛ_n_ə_s_ˌaɪ_t] (IPA phonetic alphabet).
A facultative commensal organism; one which can sustain itself apart from its usual host.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.