papillo-, papill-, papilli- +

(Latin: nipple; nipple-shaped elevation or growth)

papillomavirus
Any of several viruses of the family Papovaviridae, containing circular DNA, causing papillomas in various animals and responsible for human genital warts.
papillose
1. Relating to or resembling papilla.
2. Nipply; covered with fleshy dots or points; verucose; warty; as a papillose leaf.
3. Covered with soft tubercles; such as, the ice-plant.
papillous
A reference to the pap or nipple; resembling the nipple; covered with papils.
papillula (s), papillulae (pl)
A small papilla.
retinopapillitis
Inflammation of the retina and the optic papilla.