What is the definition or description of: narrow palate?

V shaped palate: Some people have a narrow tall palate. Some times this is a genetic tendency. Sometimes it's as a result of oral habits as a child is growing. the tongue presses right behind the front teeth and rolls back stimulating the palate to grow laterally. Children that only press their tongue forward or have a digit sucking habit, dont stimulate the needed growth laterally. This is treated with ortho