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Symmetrical

symmetrical

1. Involving or exhibiting symmetry; proportional in parts; having its parts in due proportion as to dimensions; as, a symmetrical body or building.

2. (Science: biology) Having the organs or parts of one side correspponding with those of the other; having the parts in two or more series of organs the same in number; exhibiting a symmetry.See Symmetry.

3. (Science: botany) Having an equal number of parts in the successive circles of floral organs; said of flowers. Having a likeness in the form and size of floral organs of the same kind; regular.

4. (Science: mathematics) Having a common measure; commensurable. Having corresponding parts or relations.

A curve or a plane figure is symmetrical with respect to a given line, and a line, surface, or solid with respect to a plane, when for each point on one side of the line or plane there is a corresponding point on the other side, so situated that the line joining the two corresponding points is perpendicular to the line or plane and is bisectad by it. Two solids are symmetrical when they are so situate dwith the respect to an intervening plane that the several points of their surfaces thus correspond to each other in position and distance. In analysis, an expression is symmetrical with respect to several letters when any two of them may change places without affecting the expression; as, the expression a^2b _ ab^2 _ a^2c _ ac^2 _ b^2c _ bc^2, is symmetrical with respect to the letters a, b, c. Symmetrically, Symmetricalness.

Origin: Cf. F. Symetrique. See Symmetry.


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UV Reflective Staining

... glow, suggesting also that the changes are due to an ingested chemical and thus recent (as opposed to either long-term or genetic). The ascribed asymmetrical pattern on the fingernails (and that they fade out - as those a gradual increase has been occurring) imply it's not an externalised factor ...

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by JoshuaFlynn
Tue Mar 13, 2012 7:39 am
 
Forum: Human Biology
Topic: UV Reflective Staining
Replies: 9
Views: 2023

Re: Camouflage in nature

... should not really increase or decrease the competitiveness of the bug that much until the entire process is complete Bugs tend to be bilaterally symmetrical (the left side is a mirror image of the right side) and have a distinguishable midline on at least the abdomen (the hindmost part). As with ...

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by Gavin
Fri Nov 11, 2011 6:57 am
 
Forum: Evolution
Topic: Camouflage in nature
Replies: 16
Views: 6649

Re:

It might be symmetrical in the formula h0h but that doesn't show the unshared pair. but the structural formula is not (symmetrical) ;)

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by JackBean
Sat Jan 22, 2011 9:56 pm
 
Forum: Molecular Biology
Topic: POLAR OR NONPOLAR Y OR Y NOT?
Replies: 11
Views: 19356

DNA transcription and replication

... rigth, right? That would be in 5' -> 3' direction ;) And even, there is a START codon: 3'-TGCATGCTATGCTATGCCgtaC-5' the DNA helix is completely symmetrical. If you have seen just the helix, you couldn't know, which strand is "coding" and which is "anti-sense". And definitely ...

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by JackBean
Thu Mar 18, 2010 7:02 am
 
Forum: Genetics
Topic: DNA transcription and replication
Replies: 10
Views: 3237

Handicap Theory and Defense Reactions

... owners are advertising that even with such features holding them back, they have flourished and are ready for business. A male peacock with a huge symmetrical tail will only pass the tail to male offspring, but the features that kept him from being caught and eaten, even with that tail weighing ...

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by Darby
Thu Feb 11, 2010 9:36 pm
 
Forum: Evolution
Topic: Handicap Theory and Defense Reactions
Replies: 1
Views: 1857
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