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homology    
n. 相同,异体同形,同族关系

相同,异体同形,同族关系

homology
透射

homology
n 1: the quality of being similar or corresponding in position
or value or structure or function

Homology \Ho*mol"o*gy\, n. [Gr. ? agreement. See {Homologous}.]
1. The quality of being homologous; correspondence; relation;
as, the homologyof similar polygons.
[1913 Webster]

2. (Biol.) Correspondence or relation in type of structure in
contradistinction to similarity of function; as, the
relation in structure between the leg and arm of a man; or
that between the arm of a man, the fore leg of a horse,
the wing of a bird, and the fin of a fish, all these
organs being modifications of one type of structure.
[1913 Webster]

Note: Homology indicates genetic relationship, and according
to Haeckel special homology should be defined in terms
of identity of embryonic origin. See {Homotypy}, and
{Homogeny}.
[1913 Webster]

3. (Chem.) The correspondence or resemblance of substances
belonging to the same type or series; a similarity of
composition varying by a small, regular difference, and
usually attended by a regular variation in physical
properties; as, there is an homology between methane,
{CH4}, ethane, {C2H6}, propane, {C3H8}, etc., all members
of the paraffin series. In an extended sense, the term is
applied to the relation between chemical elements of the
same group; as, chlorine, bromine, and iodine are said to
be in homology with each other. Cf. {Heterology}.
[1913 Webster]

{General homology} (Biol.), the higher relation which a
series of parts, or a single part, bears to the
fundamental or general type on which the group is
constituted. --Owen.

{Serial homology} (Biol.), representative or repetitive
relation in the segments of the same organism, -- as in
the lobster, where the parts follow each other in a
straight line or series. --Owen. See {Homotypy}.

{Special homology} (Biol.), the correspondence of a part or
organ with those of a different animal, as determined by
relative position and connection. --Owen.
[1913 Webster]


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  • Homology - Definition and Examples - Biology Online Dictionary
    In biology, homology refers to the similarity of the structure, physiology, or development of various species of other organisms as a result of their shared evolutionary parent It plays a huge part in evolutionary biology
  • What is homology in biology? - California Learning Resource . . .
    Homology is a fundamental concept in biology that has far-reaching implications for our understanding of the natural world In this article, we will delve into the meaning and significance of homology, exploring its definition, types, and examples in various biological contexts
  • homology - Wiktionary, the free dictionary
    Like many terms that start with a non-silent h but have emphasis on their second syllable, some people precede homology with an, others with a (topology):When used attributively with the name of a topological space (such as in the terms homology n-sphere and homology manifold) the reference is to a space whose homology is the same as that of the named space: thus, for example, a homology
  • HOMOLOGY Definition Meaning - Dictionary. com
    Homology definition: the state of being homologous; homologous relation or correspondence See examples of HOMOLOGY used in a sentence





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