Obsolete form of echo.

Third-person singular simple present indicative form of re-echo

plural of re-echo

plural of photo echo

plural of pre-echo

plural of tape echo

plural of light echo

A poem constructed by the surrealist technique of alternately writing a stanza and then "mirroring" it in some fashion to create the following stanza.

(physics) A form of resonance sometimes observed as a coherent pulse of light after two similar pulses have traversed a medium.

plural of echo chamber