(linear algebra) The transpose of the row echelon form of the transpose of a given matrix.

(linear algebra) row echelon form / (linear algebra) column echelon form

(economics) A socioeconomic theory stating that economic relationships (such as being an owner or capitalist, or being a worker or proletarian) are the foundation upon which all other societal and political arrangements are based

Any of various forms of art that promote living in harmony with the natural environment.

Alternative spelling of ecosocialist

Alternative spelling of ecosocialist

Alternative spelling of ecosocialism

The time between a sound or pulse of radio waves being produced and the receipt of the corresponding echo

plural of echo time

An extension of the European Union to include the European Free Trade Association.