a cerebrovascular disorder in which the main cerebral arteries at the base of the brain are replaced by a fine network of vessels. It is caused by progressive stenosis of the large-caliber vessels and development of collateral network.n idiopathic disease pattern characterised by bilateral stenosis of the internal carotid arteries, accompanied by a network of abnormal collateral vessels that bypass the stenosis.
Ante means before, just as pre does. An antenuptial agreement is the same thing as a prenuptial agreement, that is, an agreement entered into by the husband-to-be and the wife-to-be prior to the marriage. Ante = before nuptial = marriage An antenuptial agreement is the same as a prenuptial agreement. It is a legal agreement made between a man and a woman before marriage, typically to discuss division of assets should they eventually divorce.
adjective. The definition of existential is something related to existence. A philosophy designed to understand and consider existence and the meaning of existence is an example of something that would be described as existential.1  of, based on, or expressing existence. 2  of, relating to, or as conceived of in, existentialism: now often used to refer in general to the human condition as characterized by feelings of uncertainty, anxiety, depression, etc.ords near existential in the dictionary. 1  existences. 2  existencies. 3  existency. 4  existent. 5  existential. 6  existential-crisis. 7  existential-instantiation. 8  existential-nihilism. 9  existential-quantifier. 10  existentialism.