Name that shape
There is a shape that I didn't know the name of. It is made by two arcs joining at 2 points or the shape in the middle of two overlapping circles. It could be called a leaf or a petal, but leaves and petals come in lots of shapes, do they not. It isn't an ellipse, which is a squashed circle with rounded ends. It is the shape of the Maasai shield on the flag of Kenya. It is the shape of a human eye. In jewels it would seem the name marquise is used. I was thinking maybe it was lozenge, but that is a rhombus or diamond shape.
Then I found a page of 12 Shapes You Didn't Known Had Names and not until I was writing the list of shape names below did I realise that the one I was looking for is Vesica Piscis. Although once I looked that up I thought I could have called it a lens, and I missed off the shape of an American football.
Here are the lists of shapes from that article. Do you know them?
5 Star of Lakshmi
7 Vesica Piscis
12 Reuleaux Triangle
Update/PS: Vesica Piscis is latin for bladder fish but there isn't such a thing. The shape is very specific. It isn't just the overlap of two circles, they have to be equal sizes and the edge of one be on the centre of the other.
Update 2: The vesica piscis is a type of lens, a mathematical shape formed by the intersection of two disks with the same radius, intersecting in such a way that the center of each disk lies on the perimeter of the other. ... In Italian, the shape's name is mandorla ("almond"). From wikipedia.