Dictionary » V » Vertex



1. (Science: anatomy) A turning point; the principal or highest point; top; summit; crown; apex. Specifically: the top, or crown, of the head.

2. (Science: astronomy) The zenith, or the point of the heavens directly overhead.

3. (Science: mathematics) The point in any figure opposite to, and farthest from, the base; the terminating point of some particular line or lines in a figure or a curve; the top, or the point opposite the base. Vertex of a curve, the point in which the axis pierces the surface.

The principal vertex of a conic section is, in the parabola, the vertex of the axis of the curve: in the ellipse, either extremity of either axis, but usually the left-hand vertex of the transverse axis; in the hyperbola, either vertex, but usually the right-hand vertex of the transverse axis.

Origin: L. Vertex, -icis, a whirl, top of the head, top, summit, from vertere to turn. See Verse, and cf. Vortex.

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Re: Please Help! Macromolecules

... represent chemical structures. You’ve got a distorted Haworth projection of the cyclic or pyranose form of glucose. There are carbon atoms at each vertex of the hexagon (except the one occupied by an oxygen atom). If you count the vertices as one carbon each and add to that count the explicit carbon ...

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by blcr11
Wed Mar 12, 2008 6:31 pm
Forum: Molecular Biology
Topic: Please Help! Macromolecules
Replies: 9
Views: 4369

The Fiber Disease

CAT FIGHT!!! http://www.vertex.umea.com/nr3-97/bild/Cat.Fight.gif Doc44 Maybe this should be promoted in Madison Square Garden with proceeds going to research.

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by Doc44
Thu Nov 30, 2006 11:36 pm
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 5478967

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