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metameric    
位变异构的

位变异构的

metameric
adj 1: having the body divided into successive metameres or
segments, as in earthworms or lobsters [synonym: {metameric},
{segmental}, {segmented}]

isomeric \i`so*mer"ic\ ([imac]`s[-o]*m[e^]r"[i^]k), a. [Iso-
Gr. me`ros part: cf. F. isom['e]rique.] (Chem.)
Having the same chemical composition and molecular weight;
having the same number of atoms of each kind in the molecule;
-- said of chemical compounds with known chemical
composition. This property used to be called {metameric} to
distinguish it from other forms of isomerism.
[PJC]

Note: Formerly the term isomeric applied also to comopounds
having the same percentage chemical composition, even
if the number of atoms in a molecule differed. In the
1913 dictionary isomeric was defined as:
"Having the same percentage composition; -- said of two
or more different substances which contain the same
ingredients in the same proportions by weight, often
used with with. Specif.:
(a) Polymeric; i. e., having the same elements united in the
same proportion by weight, but with different molecular
weights; as, acetylene and benzine are isomeric
(polymeric) with each other in this sense. See
{Polymeric}.
(b) Metameric; i. e., having the same elements united in the
same proportions by weight, and with the same molecular
weight, but with a different structure or arrangement of
the ultimate parts; as, ethyl alcohol and methyl ether
are isomeric (metameric) with each other in this sense.
See {Metameric}."
[1913 Webster]


Metameric \Met`a*mer"ic\, a. [Pref. meta- Gr. ? part.]
1. (Chem.) Having the same molecular formula, but possessing
a different bonding structure and different properties;
as, methyl ether and ethyl alcohol are metameric
compounds. See {Isomeric}.
[1913 Webster]

Note: The existence of metameric compounds is due to
different arrangements of the same atoms in the
molecule.
[1913 Webster]

2. (Biol.) Of or pertaining to a metamere or its formation;
as, metameric segmentation.
[1913 Webster]


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  • Metamerism (color) - Wikipedia
    In colorimetry, metamerism is a perceived matching of colors with different (nonmatching) spectral power distributions Colors that match this way are called metamers
  • What Is Metamerism? The Color Illusion Explained
    Metamerism is the phenomenon where two colors look identical under one lighting condition but visibly different under another A pair of paint swatches that match perfectly in a store’s fluorescent lighting might clash noticeably once you bring them home and see them in natural daylight
  • What Is Metamerism in Color Matching? | Datacolor
    If the objects match under the primary light source but not under others, then the objects are metameric Repeating the test under a third light source can confirm the metamerism
  • METAMERIC Definition Meaning - Merriam-Webster
    The meaning of METAMERIC is composed of metameres : exhibiting bodily metamerism : segmental How to use metameric in a sentence
  • What is Metamerism? | Science Behind Metamarism | X-Rite
    Metamerism is a phenomenon that occurs when two colors appear to match under one lighting condition, but not when the light changes Metameric matches are quite common, especially in near neutral colors like grays, whites, and dark colors like these
  • What Is Metamerism in Color and Why Does It Matter?
    Metamerism arises because two different objects can have distinct spectral reflectance curves, yet still stimulate the cone cells identically under a particular light source, creating a “metameric match” despite different spectral properties
  • Metameric - Definition, Meaning Synonyms | Vocabulary. com
    ˌˈmɛdəˌmɛrɪk IPA guide Other forms: metamerically Definitions of metameric adjective having the body divided into successive metameres or segments, as in earthworms or lobsters synonyms: segmental, segmented
  • Metamerism Explained: How Lighting Affects Color Perception and Matching
    Metamerism is a phenomenon where two colors appear identical under one light source but look different under another This occurs because the spectral power distributions of the light sources and the reflectance properties of the materials interact in unique ways, causing color perception to shift
  • What Is Metamerism and How Does It Affect Our Perception of Color?
    Light is produced by an outside source, interacts with an object, and is then interpreted by our own eyes and brain The fact that this is such a complicated process gives rise to events that can seem to be an illusion at first The colors of the sun and oceans are two examples
  • Metamerism: definition, causes, and testing methods
    The term metameric derives from Greek and indicates a particular condition of apparent color matching Metamerism is the optical phenomenon whereby two color samples appear identical when illuminated by a specific light source but show clear differences when the lighting condition changes





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