1- What is a hide floor?
Is it the empty area in the ground floor of a building? Because sometimes, residential building do not build anything on the ground floor, and just leave a space with the elevator and stairs.
So, it this a hide floor?
If not, what do you call the empty ground floor? And what is a hide floor?
2- Some people have a spacing between the the upper first two teeth. (usually children).
Does it have a certain name or just tooth spacing?
#1 Can you give more context? There is not enough here to understand this term.
#2 This is a maxillary diastema. There is a tradition that if you have a gap like this, you will travel a great deal.