Widest in the center with the two ends tapering equally, generally about 1½ times as long as broad.
In the form of an ellipse, that is, about one and one half times as long as broad, widest at the middle and rounded at both ends.
Oval or oblong, with the ends regularly rounded.
A structure (leaf, fruit, petal, etc.) that is widest in the center and pointed at both ends.
Wider in the center and tapering at base and tip (as in a leaf).
Widest in the middle and up to about 3x as long as wide, tapering to the tip and the base (applied to flat objects such as leaves).
More or less oval in shape though tending to a point at each end—one of the most common leaf shapes, the term used more loosely in botany than its strict geometrical meaning.