Retrograde Metamorphism: Mineral changes within a rock that are caused by adjustments to conditions of reduced temperature and pressure.
Retrograde Filling: A method of sealing the root canal by preparing and filling it from the root tip, generally done at the completion of an apicoectomy.
Retrograde Inversion: Mirror image and backward statement of a melody.
Retrograde Application: Term used in reference to a retrograde planet which, because of its retrograde motion, applies to an aspect with another planet. If both planets are moving toward each other, the term mutual . . . View Full Definition
Retrograde Motion: The apparent backward motion of a planet when it appears, as observed from Earth, to reverse its natural direction of travel and move backward in the zodiac.
Retrograde: When a planet appears to be traveling backwards from our perspective on Earth. The energy of a retrograde planet is less assertive and more internalized.
Hydrothermal Metamorphism: Alteration of rock by hot waters or gases associated with a magmatic source.
Metamorphism: The changes of mineralogy and texture imposed on a rock by pressure and temperature in the Earth's interior. Meteoric water: Rainwater, snow, hail, and sleet.
Regional Metamorphism: Metamorphism across a broad area caused by the elevated temperatures and pressures of plate collision or deep burial.
Contact Metamorphism: Mineralogical and textural changes and deformation of rock resulting from the head and pressure of an igneous intrusion in the near vicinity.