(chemistry) Any of a group of seventeen soft, lustrous, sometimes magnetic metals that form trivalent salts; they include the lanthanides plus yttrium, scandium, thorium and sometimes zirconium.

(astronomy) A small Solar System body (ie. asteroid, comet, or large meteoroid) whose orbit brings it into proximity with Earth's orbit.

A satellite orbit around the Earth within the altitude range of 200 - 2000 km, in which a satellite can communicate with Earth with a small time lag and energy consumption. Abbreviation: LEO.

(inorganic chemistry) Alternative spelling of alkaline earth metal

(inorganic chemistry) Any of the elements of group II of the periodic table; they are low-density metals that react readily with water to form strongly basic hydroxides, and with many acids to form salts.

plural of alkaline earth metal

(idiomatic) To do whatever is necessary, including extreme or unusual actions; to go to extremes.

Strong, permanent magnets that are made from alloys of rare earth elements, are much stronger than ferrite or alnico magnets, and are extremely brittle.

The belief that God created the universe and the Earth very long ago and that the universe and the Earth are as old as scientists suggest.

(creationism, pseudoscience) Belief that the universe and the Earth are 6,000 to 10,000 years old as inferred from a literal interpretation of the creation narrative in Genesis.