1.
eclipse; obscuration of a celestial body
An astronomical eclipse, in which one celestial body is wholly or partly hidden by another. A literary or technical term that most often appears in compounds such as 日蝕 (solar eclipse) and 月蝕 (lunar eclipse); the modern everyday spelling uses 食.
A literary and technical term for an eclipse. In everyday writing the 食 spelling is standard, so 蝕 mostly appears in older or specialist astronomical texts.