Main Entry:

um·bra

Pronunciation:

\ˈəm-brə\

Function:

noun

Inflected Form(s):

plural umbras or um·brae \-(ˌ)brē, -ˌbrī\

Etymology:

Latin

Date:

1638

1: a shaded area2 a: a conical shadow excluding all light from a given source ; specifically : the conical part of the shadow of a celestial body excluding all light from the primary source b: the central dark part of a sunspot

— um·bral \-brəl\ adjective