Science / Astrology / Cusp: The midway point between two Signs of the Zodiac; also used to refer to the start of a House within the chart wheel.
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Science / Astrology / Cusp, Cusp Line: The line that separates the house and indicates the beginning of a house. See also house cusp. MORE
Health / Dentistry / Bicuspid: A two-cusped tooth found between the molar and the cuspid also known as an eye tooth or canine tooth. MORE
Health / Dentistry / Cusp(S): The protruding portion(s) of a tooth's chewing surface. MORE
Science / Astrology / House Cusp: The zodiacal degree at which a house begins. MORE
Science / Astrology / Solar Arc: The distance the Sun travels from birth position to its secondary progressed position. A system of progressions adds the soar arc at a given year to the natal positions of house cusps and/or planets. MORE
Science / Astrology / Co-Ruler: Prior to the discovery of Uranus, the Sun and Moon were believed to rule one sign each and the other five planets then known to humankind (Mercury through Saturn) to rule two signs each. When the thre MORE
