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Nadir: The nadir is the ecliptic degree most directly below, or, the intersection point of the local meridian with the ecliptic below the horizon. The lowest point in the local sky on the path of the planets, it is also known as the cusp of the fourth house, or imum coeli (I.C.). The nadir is most intimate and personal point in the chart, symbolizing one’s most inner feelings, roots, and internal sense of self.

Natal: of or relating to birth or nativity; said of a birth chart.

Native: the individual being considered in a chart, transits, or life situation. If the horoscope in question is yours, then you are considered to be the native.

Natural (house) Ruler: the planetary ruler of the sign corresponding to the number of the house in question (e.g., the Sun rules Leo, the fifth sign, and is therefore the natural ruler of the fifth house). The alternative to this is called the "accidental ruler," and describes the ruler of the sign that actually IS on the cusp of the house in question. Thus if one has Aquarius rising and Pisces on the second house cusp, then Uranus (ruler of Aquarius) and Neptune (ruler of Pisces) are the respective accidental rulers of the first and second houses in that particular chart; whereas Mars and Venus are the natural rulers of the first and second houses in every chart, since they respectively rule the first (Aries) and second (Taurus) signs. 

Node(s), Dragon’s Head/Tail: points of intersection of a planet’s orbit with the ecliptic. Usually only the Moon’s nodes are interpreted. The Moon’s South Node (cup holding water) denotes talents, or habit patterns from past lives: that which we know well. The Moon’s North Node is that with which we are least familiar: important new elements we need to add to our lives to grow and to become whole. Comfortable familiarity at the South Node pulls us away from the North Node, making growing there more difficult.

Novile: a minor aspect of 40°: 1/9th of the circle; in Hindu astrology, the marriage partner; to the Greeks, the ideal, or completion; orb 0.5° - 1°.