[ pɪ'nʌmbrə ]
■ noun ( plural ~e -bri: or ~s )
1》 the partially shaded outer region of the shadow cast by an opaque object, especially the area of the earth or moon experiencing a partial eclipse.
2》 Astronomy the less dark outer part of a sunspot.
Derivatives
~l adjective
Origin
C17: mod. L., from L. paene 'almost' + umbra 'shadow'.