countershading


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coun·ter·shad·ing

 (koun′tər-shā′dĭng)
n.
Coloration of an animal in which the upper side is darker in color than the underside, thought to be a form of camouflage.

countershading

(ˌkaʊntəˈʃeɪdɪŋ)
n
(Zoology) (in the coloration of certain animals) a pattern, serving as camouflage, in which dark colours occur on parts of the body exposed to the light and pale colours on parts in the shade

coun•ter•shad•ing

(ˈkaʊn tərˌʃeɪ dɪŋ)

n.
(of an animal) coloration that is dark on parts of the body surface that are usu. exposed to the sun and light on parts usu. in shade.
[1895–1900]
References in periodicals archive ?
The dinosaur also showed countershading patterns, in which the top part of the animal is darker-colored and the bottom is lighter.
The researchers came to that conclusion based on studies of the dinosaur's skin, showing that Borealopelta exhibited countershading, a common form of camouflage in which an animal's underside is lighter than its back.
If it is a bright day, a bright color such as blue and white mimics the natural countershading of a baitfish.
That type of coloring, called countershading, shows up in animals from penguins to fish and may act as a form of camouflage.
Psittacosaurus was mainly brown but with a paler underside of the tail and belly, a pattern called countershading that may have helped the 1.
This is achieved either through crypsis--the process of blending with a background through methods including countershading and disruptive patterning--or mimicry which allows an object to stand out but in disguise.
In addition, the statocyst is necessary for proper vestibular function, such as the countershading reflex, dorsal light reflex, and compensatory counter rolling of the eyes.
Some have pearlescent blue or black countershading.
The principles of realistic painting were essential, but so also was countershading to hide the shadow of the underside of objects, and disruptive patterning to break up form in space.
A number of woodland and wetland animals eliminate telltale shadows by a color pattern called countershading, in which a darker back and flanks gradually merge into a lighter belly.
The only possible cryptic coloration is the lack of color, or what is called countershading, which consists of having a dark, shaded dorsal surface which will not stand out against the ocean bottom when seen from above, and a clear, reflective ventral surface that may be mistaken for the surface when seen from below.