Definition: A table that shows the positions of a celestial object at specific times over a certain period.

Example: Astronomers use an ephemeris to track the movements of planets and stars.

Definition: The outer layer of a developing embryo that eventually forms the skin and nervous system.

Example: During early development, the epiblast plays a crucial role in forming the ectoderm.

Definition: Relating to the outer layer of cells in an embryo that develops into the skin and nervous system.

Example: The epiblastic layer plays a crucial role in the early development of the embryo.

Definition: Describing a process or growth that involves covering or growing over something, often used in biological contexts.

Example: The epibolic movement of cells is crucial during the early stages of embryonic development.

Definition: The process where a group of fast-growing cells surrounds a group of slower-growing cells, often seen during the early stages of development in embryos.

Example: During embryonic development, epiboly allows the cells to spread and cover the surface of the embryo.

Definition: Relating to the outer layer of the heart that covers the heart muscle.

Example: The surgeon carefully examined the epicardial layer during the operation.

Definition: The inner layer of the protective membrane surrounding the heart that is in direct contact with its surface.

Example: The surgeon carefully examined the epicardium during the heart surgery.

Definition: The point on the Earth's surface that is directly above where an earthquake starts, or a central point of something significant.

Example: The city was located at the epicenter of the earthquake, causing widespread damage.

Definition: Relating to the point on the Earth's surface that is directly above the focus of an earthquake.

Example: The epicentral area experienced the most severe shaking during the earthquake.

Definition: A clear, colorless liquid that is used as a solvent in the production of resins and other chemicals.

Example: Epichlorohydrin is commonly used in the manufacturing of epoxy resins.