(demographics) A child of a member of the post-World War II baby boom generation, born in the period extending approximately from the late 1970s or early 1980s to the mid-1990s.

plural of pre-echo

An early sign or indication of something; a foreshadowing.

The technique of using reflected pulses of sound to determine depth or the location of objects (or fish) under water. / A particular measurement made using this technique.

(astronomy) A phenomenon caused by light reflected off surfaces distant from the source, and arriving at the observer with a delay relative to this distance, analogous to an echo of sound.

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.

A room or other enclosed space that is highly conducive to the production of echoes, particularly one that has been designed and built for this purpose.

plural of echo chamber

(phonology) A paragogic vowel that is a repetition of the final vowel of a word