"oval" in the noun sense
1. ellipse, oval
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"
"oval" in the adjective sense
1. egg-shaped, elliptic, elliptical, oval, oval-shaped, ovate, oviform, ovoid, prolate
rounded like an egg
Source: WordNet® (An amazing lexical database of English)
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