A fine clay used in fulling cloth.

The United Nations Conference on Environment and Development held in Rio de Janeiro in 1992.

(idiomatic) Practical; realistic; pragmatic. / (idiomatic) Ordinary; normal; run-of-the-mill.

An outhouse or lavatory which uses a cesspit rather than a flush toilet and plumbing.

(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.

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

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

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

plural of earth science

Any of the sciences dealing with the planet Earth, such as geology and meteorology.