Vertex

Science / Astrology / Vertex: The point found in the western section of a horoscope that indicates the intersection of the ecliptic and prime vertical, called the 'third angle of a horoscope'. This point and its opposite, the Anti-Vertex, are sensitive degrees in a natal horoscope associated with fate and wish fulfillment.
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Other Words for Vertex

Vertex Adjective Synonyms: top, tip, extremity, zenith, meridian, apogee, peak, apex, acme, summit, pinnacle, crest, crown, cap, height(s)
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Radian

Science / Chemistry / Radian: An angle with vertex at the center of a circle of radius r that encompasses an arc of length r. MORE

Steradian

Science / Chemistry / Steradian: A solid angle with vertex at the center of a sphere of radius r that encompasses an area of r2 on the surface of the sphere. MORE