1. Of or pertaining to the region of partial shadow around an umbra

See also: penumbra

Encyclopedia: Penumbral

• ditty
• ditty bag
• ditz
• ditzy
• diuresis
• diuretic
• diuretic drug
• Diuril
• diurnal
• diurnal parallax
• diurnal variation
• diurnally
• div
• diva
• divagate
• divagation
• divalent
• divan
• divan bed
• divaricate
• divarication
• dive
• dive bomber
• dive brake
• dive-bomb