Bean Leaf Definition?

[Shoreguy]

I am beginning to suspect that the concept of bean leaf Neofinetias is not meaningful or at best not clearly defined.

I always thought that having a rounded leaf tip was the defining characteristic but now I occasionally see advertisements referring to plants being offered as beanleafs which have pointed leaves!

Is the whole concept really defined or just meaningless advertisers jargon? Is there some clear definition known only to the privileged few?

Is it that a bean leaf is a bean leaf if it is in the eyes of the beholder? ie totally meaningless. I have no idea.