(linear algebra) The stepped appearance of a matrix that has undergone Gaussian elimination with the result that the leading coefficient or pivot (that is, the first nonzero number from the left) of a nonzero row is to the right of the pivot of the row above it.

(linear algebra) The form of a row-reduced matrix which is in row echelon form.

(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

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

plural of echo time

plural of row echelon form

Psittacula eques, a parrot endemic to the Mascarene Islands of Mauritius and formerly Réunion.

plural of echo parakeet

plural of echellette