incidence

English Thesaurus

1. the striking of a light beam on a surface (noun.phenomenon)

hypernym	:	optical phenomenon,
definition	:	a physical phenomenon related to or involving light (noun.phenomenon)

2. the relative frequency of occurrence of something (noun.linkdef)

hypernym	:	frequency, relative frequency,
definition	:	the ratio of the number of observations in a statistical category to the total number of observations (noun.linkdef)

hyponym	:	morbidity,
definition	:	the relative incidence of a particular disease (noun.linkdef)

3. the striking of a light beam on a surface (noun.phenomenon)

derivation	:	incident,
definition	:	falling or striking of light rays on something (adj.pert)

derivation	:	incident,
definition	:	falling or striking of light rays on something (adj.pert)