Meaning & History. From an English surname which was derived from the given name GERALD or GERARD. A famous bearer of the surname was Pat Garrett (1850-1908), the sheriff who shot Billy the Kid.
Definition of avocational. 1  1 : of or relating to an avocation an avocational interest in sports. 2  2 : being such by avocation an avocational musician.
An arteriovenous malformation, or AVM, is an abnormal tangle of vessels in the brain or spinal cord in which one or more arteries are directly connected to one or more veins. Arteries carry blood from the heart to the tissues and veins take blood back from the tissues to the heart. In an AVM, the direct connection between one or more arteries and veins gives rise to many problems.