|
Umbra - Dictionary Definition and Overview |
|
Umbra : (noun)
1: a region of complete shadow resulting from total obstruction
of light
Based on WordNet 2.0
|
|
Penumbra \Pe*num"bra\, n. [NL., fr. L. paene almost _Umbra : shade.]
1. An incomplete or partial shadow.
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.
Note: The faint shade surrounding the dark central portion of
a solar spot is also called the penumbra, and
sometimes umbra.
3. (Paint.) The part of a picture where the shade
imperceptibly blends with the light.
Based on Webster's Revised Unabridged Dictionary
|
|
Umbra : \Um"bra\, n.; pl. Umbr[ae]. [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.
2. (Zo["o]l.) Any one of several species of sci[ae]noid food
fishes of the genus Umbrina, especially the
Mediterranean species ({U. cirrhosa), which is highly
esteemed as a market fish; -- called also ombre, and
umbrine.
Umbra_tree_(Bot.),_a_tree_({Phytolacca_diocia">Umbra tree (Bot.), a tree ({Phytolacca diocia) 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).
Based on Webster's Revised Unabridged Dictionary (1913)
|
|
|
|
Example Usage of Umbra |
 |
orvietonews: Gala vittorioso in trasferta ed in finale di Coppa Umbra ... http://tinyurl.com/yzbcfvz |
 |
Daily_Find: New #Bargains: Umbra Aquala Bathtub Caddy:
Umbra Aquala Bathtub Caddy is going for $39.99 and fr.. http://bit.ly/6XGja5 |
 |
nsu_birotor: @zeonic1304 Battle for the Umbra throneいいね。サントラだけでも買おうかなぁ・・・ |
|
