(mathematics) Any power series such that the ratio of the (k+1)-th and the k-th terms is a rational function of the natural integer k.

(law) Acronym of Racketeer Influenced and Corrupt Organizations (Act).

(medicine) A syndrome of headaches, characterized by one to three short daily attacks of pain around the eyes, occurring for a month or two, followed by a pain-free period of about a year before re...

plural of lillianite