in·ci·dence 
/ˈɪnsədəns/ noun
plural in·ci·denc·es /ˈɪnsədəns/ noun [count] 1 : the number of times something happens or develops : the rate at which something occurs
▪ The drug has been linked with a higher incidence of certain cancers. [=the drug seems to cause certain cancers; people who take the drug seem to be more likely to get certain cancers] ▪ an increased incidence of diabetes ▪ a high/low incidence of criminal behavior ▪ a disease with an incidence of one in 100,000 [=a disease that affects one person out of every 100,000] 2 technical : the angle at which a ray (such as a ray of light) hits a surface
▪ the angle of incidence
▪ The drug has been linked with a higher incidence of certain cancers. [=the drug seems to cause certain cancers; people who take the drug seem to be more likely to get certain cancers] ▪ an increased incidence of diabetes ▪ a high/low incidence of criminal behavior ▪ a disease with an incidence of one in 100,000 [=a disease that affects one person out of every 100,000]
▪ the angle of incidence
