I believe it's a phrase that starts a noun clause
Variable
It is: 53 = 125
No it is just an exspression
5 - 3y
n-2
Transitional
A transitional boundary.
Transitional epithelium cells can stretch. They can be found in organs that have the ability to stretch such as the bladder.
transitional provision
Of or pertaining to transition; involving or denoting transition; as, transitional changes; transitional stage.
Transitional phrases are essential to good flow in an essay."In addition" is an example of a transitional phrase.Caterpillars are a transitional step in the life of a butterfly.
stratified squamous and transitional epithelium