Noun
antumbra
(rare) The region from which an occulting body appears entirely contained within the disc of the light source.
A total eclipse occurs when the observer is within the umbra, an annular eclipse when the observer is within the antumbra, and a partial eclipse when the observer is within the penumbra. Source: Internet
Umbra, Penumbra, and Antumbra: Why Are There 3 Shadows? Source: Internet
The same terms may be used analogously in describing other eclipses, e.g., the antumbra of Deimos crossing Mars, or Phobos entering Mars's penumbra. Source: Internet