patent ductus arteriosus: a ductus arteriosus that failed to close at birth; may require surgical correction
ductus arteriosus: a blood vessel in a fetus that bypasses pulmonary circulation by connecting the pulmonary artery directly to the ascending aorta; normally closes at birth
calisaya: Peruvian shrub or small tree having large glossy leaves and cymes of fragrant yellow to green or red flowers; cultivated for its medicinal bark