| slovo | definícia |
Metamer
(gcide) | Metamer \Met"a*mer\, n. [See Metamere.] (Chem.)
Any one of several metameric forms of the same substance, or
of different substances having the same composition; as,
xylene has three metamers, viz., orthoxylene, metaxylene, and
paraxylene; an isomer.
[1913 Webster] |
| | podobné slovo | definícia |
metamere
(encz) | metamere, n: |
metameric
(encz) | metameric,metamerní Zdeněk Brož |
metamerní
(czen) | metamerní,metameric Zdeněk Brož |
Metamere
(gcide) | Metamere \Met"a*mere\, n. [Pref. meta- + -mere.] (Biol.)
One of successive or homodynamous parts in animals and
plants; one of a series of similar parts that follow one
another in a vertebrate or articulate animal, as in an
earthworm; a segment; a somite. See Illust. of {Loeven's
larva}.
[1913 Webster] |
Metameres
(gcide) | Morphon \Mor"phon\, n. [Gr. ?, p. pr. of ? to form.] (Biol.)
A morphological individual, characterized by definiteness of
form, in distinction from bion, a physiological individual.
See Tectology. --Haeckel.
[1913 Webster]
Note: Of morphons there are six orders or categories: 1.
Plastids or elementary organisms. 2. Organs,
homoplastic or heteroplastic. 3. Antimeres (opposite
or symmetrical or homotypic parts). 4. Metameres
(successive or homodynamous parts). 5. Personae
(shoots or buds of plants, individuals in the narrowest
sense among the higher animals). 6. Corms (stocks or
colonies). For orders 2, 3, and 4 the term idorgan has
been recently substituted. See Idorgan.
[1913 Webster] |
metameric
(gcide) | 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] |
Metameric
(gcide) | 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.
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Metamerically
(gcide) | Metamerically \Met`a*mer"ic*al*ly\, adv.
In a metameric manner.
[1913 Webster] |
Metamerism
(gcide) | Metamerism \Me*tam"er*ism\, n.
1. (Biol.) The symmetry of a metameric structure; serial
symmetry; the state of being made up of metameres.
[1913 Webster]
2. (Chem.) The state or quality of being metameric; isomerism
due to different bonding patterns in two substances having
the same molecular formula. Contrasted with
steroisomerism or optical isomerism. Also, the
relation or condition of metameric compounds.
[1913 Webster] |
metamere
(wn) | metamere
n 1: one of a series of similar body segments into which some
animals are divided longitudinally [syn: metamere,
somite] |
metameric
(wn) | metameric
adj 1: having the body divided into successive metameres or
segments, as in earthworms or lobsters [syn: metameric,
segmental, segmented] |
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