| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
| a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes. |
AIDS-related complex n.
Abbr. ARC
The early manifestations of AIDS in individuals who have not developed deficient immune function, characterized by fever, generalized lymphadenopathy, diarrhea, and weight loss.