How to pronounce“postotic”in English

to be interested in dendritic cells and because I had the ability to work with them and they're very hard to work with because as I said they're hen teeth rareand they like to die they're postotic which means they don't divide so anything you do to them just makes them die and because I had this associationwith Ralph they asked for me to come and work at the Walter Reed um on dendritic