umb
ra
Plural
umbras
1
the part of a shadow that is completely dark; caused by acute light blockage
- During the eclipse, the moon cast an umbra on the Earth's surface.
- In a total solar eclipse, the umbra creates complete darkness.
- The umbra of the building provided shade from the hot sun.
- Standing in the umbra of the tree, they escaped the summer heat.
- The shadow's umbra was clearly defined against the bright background.