Matching Pairs MedicineOnline version Match IPA symbols with their definitions. by Karen Estrella Romero González 1 /ˈhaɪ.dʒiːn/ 2 /ˈsɝː.dʒən/ 3 /ˈsaɪd ɪˌfekt/ 4 /dʒɝːm/ 5 /ˈkɑːn.ʃəs/ A doctor who is specially trained to perform medical operations. To notice that a particular thing or person exists or is present. A tiny organism that causes disease The degree to which people keep themselves or their environment clean, especially to prevent disease. An unpleasant effect of a drug, medical treatment, or vaccine that happens in addition to the main intended effect.