antumbra
noun/ænˈtʌm.bɹə/ · /ˈæn.tʌm.bɹə/
Etymology From ante- (“before”) + umbra (“shadow”).
1
Rare The region from which an occulting body appears entirely contained within the disc of the light source.
- Related terms
- umbra#Derived_terms
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.