| 释义 |
um·bra
\ˈəmbrə\ noun
(plural umbras \-brəz\ ; or um·brae \-ˌbrē, -rī\ ; except sense 5)
Etymology: Latin
1.
a. : ghost, phantom
< a spectral umbra pointing heavenward — Walter Besant & James Rice >
b. : one that tags along with another : shadow 10a
< the dependable umbra of the guest of honor >
2. : a shaded area : darkness
< sealed off in the umbra beyond the flame tips — Robert Hazel >
3.
a. : a shadow excluding all light from a given source; specifically : the part of the shadow of a celestial body having all the light from the primary source geometrically excluded and having a conical shape in bodies of the solar system — compare penumbra 1
b.
(1) : penumbra 2
(2) : the central dark part of a sunspot
4. : any of several food fishes of the genus Umbrina; especially : a Mediterranean food fish (U. cirrhosa) that is much esteemed as a market fish
5. capitalized [New Latin, from Latin, shade, shadow, grayling, umbra] : a genus (the type of the family Umbridae) of small bottom-dwelling freshwater fishes containing the mudminnows of northern No. America and southeastern Europe |