patent (persistent) ductus arteriosus This is a persistent opening between the two major blood vessels leading from the heart. The
Platelet-derived growth factors
poly-DL–lactide acid Polylactide (Poly(lactic acid), PLA) is polymer obtained by the ring-opening polymerization of lactide (cyclic dimer of lactic acid)
These are 2 examples. For more, have a look in the Glossary!