| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
parabiosis par·a·bi·o·sis (pār'ə-bī-ō'sĭs)
n.
The fusion of whole eggs or embryos, as occurs in conjoined twins.
Surgical joining of the vascular systems of two organisms.