In the shape of an oval, or similar to the shape of an oval.
1862, "Mr. Axtell", The Atlantic Monthly, volume 10, page 447:Obeying the mighty behest, I beheld, and an ovaline picture, painted in the artistry of heaven, let down from the crystalline walls, that I might not see, and held fast by a cord of gold, safe in an angel's keeping, God had sent for me to look upon.
1994, Tito Perdue, The New Austerities, p. 33:He took two bottles, one of which held an ovaline pill that was faintly pink and bore a label on it with a picture of the moon.
2013, Steve Moody, The Gossamer Intervention, page 272:Passing the large, ovaline swimming pool with its pretty little wooden bridge that connected the adult swimming and children's splashing areas, they skirted along the sea-side edge of the main hotel and then veered to the right when they came to the croquet lawn.
