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 area
2 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