Isabel snuck into the guest bedroom and settled into an overstuffed armchair at a penumbral corner.
Strange, penumbral, characters roam the boardrooms of banks in the countries in transition.
The line between the real and imaginary is vague and penumbral to us.
The penumbral line is marked from hour to hour on the maps given annually in the American Ephemeris.
It may be that all the elements of the penumbral cone intersect the earth.
Plural penumbras or penumbrae (pĭ-nŭm'brē)