If it had no straight lines it might be described as an oval. It is a rectangle with radiused ends; it might also be described as a quadrilateral with radiused ends. But that doesn’t sound too clever does it?
that I didn’t find an answer to, when I thought about
it during student times.
And I don’t have one now. Never heard of Lews suggestion,
even if it is geometrical precise. I’ve heard pill shaped, but
that implies vaulted upper and under sides?
At BYU, I was told there are there main design paradigms in electronics: the fig newton, the taco, and the ice cream sandwich. This looks like a fig newton to me. =)