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noun

Umbra n. (pl. umbrae)

(Astron.)

(a)

The conical shadow projected from a planet or satellite, on the side opposite to the sun, within which a spectator could see no portion of the sun's disk; used in contradistinction from penumbra. See Penumbra.

(b)

The central dark portion, or nucleus, of a sun spot.

(c)

The fainter part of a sun spot; now more commonly called penumbra.

(Zool.) Any one of several species of sciaenoid food fishes of the genus Umbrina, especially the Mediterranean species (Umbrina cirrhosa), which is highly esteemed as a market fish; called also ombre, and umbrine.

Umbra tree (Bot.), a tree (Phytolacca dioica) of the same genus as pokeweed. It is native of South America, but is now grown in southern Europe. It has large dark leaves, and a somber aspect. The juice of its berries is used for coloring wine.

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Etymology of 'Umbra'

Collaborative International Dictionary of English 0.48

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"Umbra" Quotes from Famous Books

... 77163 FAX: [501] (2) 30802 Flag: blue with a narrow red stripe along the top and the bottom edges; centered is a large white disk bearing the coat of arms; the coat of arms features a shield flanked by two workers in front of a mahogany tree with the related motto SUB UMBRA FLOREO (I Flourish in the Shade) on a scroll at the bottom, all encircled by a ...

— The 1993 CIA World Factbook • United States. Central Intelligence Agency.