noun
maximum eclipse; maximum obscuration
Astronomical term for the moment of greatest coverage during an eclipse, when the eclipsed body is most obscured.
食甚の時刻は午後3時15分と予測されている。
The time of maximum eclipse is predicted to be 3:15 PM.
皆既日食では、食甚の前後にダイヤモンドリングが見られる。
During a total solar eclipse, the diamond ring effect can be seen around the time of maximum eclipse.
Compound of 食 (eclipse) and 甚 (extreme, very), literally 'extreme eclipse'. The term is used in astronomy to denote the peak phase of an eclipse.