umbra - definition and synonyms

  1.   From our crowdsourced Open Dictionary
    the central cone of darkness in the shadow thrown on the surface of the moon during an eclipse

    The Moon stands over the southern Indian Ocean as it passes through the central dark umbra of the Earth's shadow, plunging deeper into the shadow than during any eclipse since 2000.

    Submitted by Mortimer from United Kingdom on 30/06/2011