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The Collaborative International Dictionary of English v.0.48 (gcide)

Ombre \Om"bre\, n. [F., of uncertain origin.] (Zool.)
A large Mediterranean food fish ({Umbrina cirrhosa}): --
called also {umbra}, and {umbrine}.
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Penumbra \Pe*num"bra\, n. [NL., fr. L. paene almost umbra
shade.]
1. An incomplete or partial shadow.
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2. (Astron.) The shadow cast, in an eclipse, where the light
is partly, but not wholly, cut off by the intervening
body; the space of partial illumination between the umbra,
or perfect shadow, on all sides, and the full light. --Sir
I. Newton.
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Note: The faint shade surrounding the dark central portion of
a solar spot is also called the {penumbra}, and
sometimes {umbra}.
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3. (Paint.) The part of a picture where the shade
imperceptibly blends with the light.
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Umbra \Um"bra\, n.; pl. {Umbrae}. [L., a shadow.]
1. (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.
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2. (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}.
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{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. --J. Smith (Dict. Econ. Plants).
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