Beans are contained inside the bean pod which is also edible. These pods grow on climbing vines.
bean
There are purple beans but the vanilla bean is brown.
the bean. It is inside of a little pod that looks like a green bean only they are brown. That is where they get the vanilla flavoring.
it is a bean pod
cocoa
The scientific name of the bean pod is Phaseolus vulgaris.
lentil
purple
A three letter word for bean hull is "POD".
They are edible, full of nutrients and antioxidants
An orchid seed is very small and is not called anything other than a seed. The orchid seed is found in a pod which would be considered the bean though it is not usually edible. Because the seed is found in a pod and is the part that can reproduce the plant, it could be classified a kernel. This would fit with the dictionary definition but I have never heard it called anything but a seed. The orchid pod that is most common to us is the vanilla bean. You use the seeds as flavoring.