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O·val a.

1. Of or pertaining to eggs; done in the egg, or inception; as, oval conceptions. [Obs.]

2. Having the figure of an egg; oblong and curvilinear, with one end broader than the other, or with both ends of about the same breadth; in popular usage, elliptical.

3. Bot. Broadly elliptical.

**Oval chuck** Mech., a lathe chuck so constructed that work attached to it, and cut by the turning tool in the usual manner, becomes of an oval form.

O·val, n. A body or figure in the shape of an egg, or popularly, of an ellipse.

**Cassinian oval** Geom., the locus of a point the product of whose distances from two fixed points is constant; -- so called from Cassini, who first investigated the curve. Thus, in the diagram, if P moves so that P A.P B is constant, the point P describes a Cassinian oval. The locus may consist of a single closed line, as shown by the dotted line, or of two equal ovals about the points A and B.

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From: WordNet (r) 2.0

oval

adj : rounded like an egg [syn: egg-shaped, elliptic, elliptical,

ovate, oviform, ovoid, prolate]

n : a closed plane curve resulting from the intersection of a

circular cone and a plane cutting completely through it;

"the sums of the distances from the foci to any point on

an ellipse is constant" [syn: ellipse]