Definition of actinotherapy in English:

actinotherapy

noun

Medicine
rare
  • Originally: treatment of disease by means of light; = phototherapy. In later use also: = radiotherapy.

Origin

Early 20th century. From actino- + therapy, probably after German Actinotherapie. Compare French actinothérapie.

Pronunciation:

actinotherapy

/ˌaktɪnə(ʊ)ˈθɛrəpi/