Desertification
When phlegm comes out when you caugh it is called productive cough. If nothing is produced it is called as dry or non - productive cough
The process is called desertification.
Nyasa-land was previously called British Central Africa.
Cellwalls are called as a 'productive membrane'.
Originally Thailand was called Siam until 1942.
conversion
stamens
It was previously titled The Gift that Nobody Wants.
The process of conversion of gas into water is called condensation.
MNE
It's usually just called conversion, or unit conversion.