If it's the space between two leaves or wythes of a cavitywall, it's just called the cavity. If it's a hole in dry masonry,it's a smoot, a bolt hole or a cripple hole. If it's the gaps inthe parapet of a battlement, it's called the crenel. read more
The space between your eyebrows is called the "glabella." Chinese Face Reading - There is a special name for the space between the eyebrows, called the ‘Yin Tang’. read more