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Vertex   Listen
noun
Vertex  n.  (pl. E. vertexes, L. vertices)  A turning point; the principal or highest point; top; summit; crown; apex. Specifically:
(a)
(Anat.) The top, or crown, of the head.
(b)
(Astron.) The zenith, or the point of the heavens directly overhead.
(c)
(Math.) 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. Note: 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.
Vertex of a curve (Math.), the point in which the axis of the curve intersects it.
Vertex of an angle (Math.), the point in which the sides of the angle meet.
Vertex of a solid, or Vertex of a surface of revolution (Math.), the point in which the axis pierces the surface.






Collaborative International Dictionary of English 0.48








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"Vertex" Quotes from Famous Books



... triangular pieces of cloth (impervious to light) are to be attached, their shape being such that when their adjacent edges are sewn together and the flaps stretched out, they form a rectangular pyramid of which the frame is the base. Through the vertex of this pyramid (near which, of course, the cloth flaps are not sewn together) the telescope tube is to be passed, and an elastic cord so placed round the ends of the flaps as to prevent any light from penetrating between them and the telescope. ...
— Half-hours with the Telescope - Being a Popular Guide to the Use of the Telescope as a - Means of Amusement and Instruction. • Richard A. Proctor

... the moment to stand opposite to C, and has impelling force applied to it, then C becomes the point of resistance, and thus counter-fractures at the cranial base occur in the neighbourhood of C. When force is applied to the cranial vertex, whilst the body is in the erect posture, the top of the cervical spine, E D C, becomes the point of resistance. Or if the body fall from a height upon its cranial vertex, then the propelling force will take effect at the junction of the spine with the cranial base, whilst the resisting ...
— Surgical Anatomy • Joseph Maclise

... dark woven fabric much like broadcloth. It is encircled at the level of the forehead with a broad band of gilt braid, as if to ape the style of a soldier. The median line from the forehead over the vertex to the back-head is crested with the mahiole ridge. This, taken in connection with the [Page 92] encircling gilt band, gives to the head a warlike appearance, somewhat as if it were armed with the classical helmet, the Hawaiian name for which is mahi-ole. The crest of the ...
— Unwritten Literature of Hawaii - The Sacred Songs of the Hula • Nathaniel Bright Emerson

... shorten the diameter—so that the curve which he was now following was a spiral one, and gradually drawing nearer to the hare. The latter kept watching him as he moved—curiosity evidently mingling with her fears. Fortunately, as Norman had said, the sun was nearly in the vertex of the heavens, and his own body cast very little shadow upon the snow. Had it been otherwise, the hare would have been frightened at the moving shadow, and would have sprung out of her form, before he ...
— Popular Adventure Tales • Mayne Reid

... lines. Black; the face and cheeks densely clothed with short cinereous pubescence, the vertex thinly so; the margins of the prothorax, mesothorax and scutellum with a line of pale ochraceous pubescence, the disk of the thorax thinly covered with short pubescence of the same colour, the emargination of the metathorax as well as its sides with longer pubescence of ...
— Journal of the Proceedings of the Linnean Society - Vol. 3 - Zoology • Various

... denotes the whole time of flight from O to the point B (fig. 1), where the trajectory cuts the line of sight; so that 1/2T is the time to the vertex A, where the shot is flying ...
— Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 2 - "Baconthorpe" to "Bankruptcy" • Various

... in her very best morning frock, one reserved for those rare occasions when people drop in over night and sleep with them. She has, indeed, all the festive appearance of a person who expects to be called away at a second's notice into a very vertex ...
— April's Lady - A Novel • Margaret Wolfe Hungerford

... cursed inwardly and outwardly! May he be cursed in his hair; cursed be he in his brains, and in his vertex, in his temples, in his eyebrows, in his cheeks, in his jaw-bones, in his nostrils, in his teeth and grinders, in his lips, in his shoulders, in ...
— Americanism Contrasted with Foreignism, Romanism, and Bogus Democracy in the Light of Reason, History, and Scripture; • William Gannaway Brownlow



Words linked to "Vertex" :   roof peak, crown, point of intersection, peak, acme, intersection, apex, extreme



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