(inorganic chemistry) Alternative spelling of alkaline earth metal

(chemistry) Any oxide of the elements of group II of the periodic table; they are not as basic as the alkalis, and not so soluble in water.

(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.

(North American countries) April 22; Created in 1970, global day of observance of the need to protect the earth. / (obsolete, US) March 21st.

(idiomatic, archaic) A most worthy person. / (idiomatic) A decent, dependable, unpretentious person.

plural of alkaline earth metal

(idiomatic) A very unpleasant situation; torment, particularly when widespread.

(rare, science fiction, nonstandard) A person or thing from planet Earth; an Earthling.

(rare, science fiction, nonstandard) Of or from planet Earth.

(science fiction) A person from planet Earth.