The Collaborative International Dictionary of English v.0.48:

Oval \O"val\, n.
   A body or figure in the shape of an egg, or popularly, of an
   ellipse.
   [1913 Webster]

   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.
      [1913 Webster]
      [1913 Webster] Ovalbumin

The Collaborative International Dictionary of English v.0.48:

Oval \O"val\, a. [F. ovale, fr. L. ovum egg. Cf. Egg, Ovum.]
   1. Of or pertaining to eggs; done in the egg, or inception;
      as, oval conceptions. [Obs.]
      [1913 Webster]

   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.
      [1913 Webster]

   3. (Bot.) Broadly elliptical.
      [1913 Webster]

   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.
      [1913 Webster]

WordNet (r) 3.0 (2006):

oval
    adj 1: rounded like an egg [syn: egg-shaped, elliptic,
           elliptical, oval, oval-shaped, ovate, oviform,
           ovoid, prolate]
    n 1: 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, oval]

Moby Thesaurus II by Grady Ward, 1.0:

55 Moby Thesaurus words for "oval":
   archery ground, athletic field, badminton court, baseball field,
   basketball court, billiard parlor, bowling alley, bowling green,
   course, court, cricket ground, croquet ground, croquet lawn,
   diamond, egg-shaped, ellipse, ellipsoidal, elliptic, elliptical,
   fairway, field, football field, glaciarium, golf course,
   golf links, gridiron, gym, gymnasium, ice rink, infield, links,
   obovate, obovoid, outfield, ovate, oviform, ovoid, ovule,
   playground, playing field, playroom, polo ground, pool hall,
   poolroom, putting green, racecourse, racket court, rink,
   skating rink, soccer field, squash court, stretch, tennis court,
   track, turf



V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

OVAL
       Open Vulnerability and Assessment Language (XML)