In his glottochronology-based classification, Alexander Militarev presents the Modern South Arabian languages as a South Semitic branch opposed to a North Semitic branch that includes all the other Semitic languages. They are no longer considered to be descendants of the Old South Arabian language, as was once thought, but instead "nephews".
Ancient Semitic religion encompasses the polytheistic religions of the Semitic peoples from the ancient Near East, Northeast Africa, and Malta.Since the term Semitic itself represents a rough category when referring to cultures, as opposed to languages, the definitive bounds of the term "ancient Semitic religion" are only approximate.
Science and mathematics. Ray (geometry), half of a line proceeding from an initial point Ray (graph theory), an infinite sequence of vertices such that each vertex appears at most once in the sequence and each two consecutive vertices in the sequence are the two endpoints of an edge in the graph