He used the ancient Greek term pepeiramenoi to mean observations, or at most investigative procedures like dissection.
hiː jˈuːzd ðɪ ˈeɪntʃənt ɡɹˈiːk tˈɜːm pˈɛpɛɹˌeɪmnɔɪ tə mˈiːn ɑːbzɚvˈeɪʃənz, ɔːɹ æt mˈoʊst ɪnvˌɛstᵻɡˈeɪɾɪv pɹəsˈiːdʒɚz lˈaɪk daɪsˈɛkʃən.