penumbral

1. 1.

   of or pertaining to the region of partial shadow around an umbra

Questions about penumbral

What does penumbral mean?

penumbral means "of or pertaining to the region of partial shadow around an umbra".

How many syllables are in penumbral?

penumbral has 3 syllables: pe-num-bral. The stress falls on "pe".

Is penumbral a common word?

penumbral is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.