Around 1986 John Joyce (of Bowin Cars fame), an influential Australian inventor, first learned about oxides of nitrogen (NOx) and their role in the production of smog and acid rain.
Sounding. A set of data measuring the vertical structure of an atmospheric parameter (temperature, humidity, pressure, winds, etc.) at a given time. You can either type in the word you are looking for in the box below or browse by letter. Search:
noun. 1 (plural echoes) A sound or sounds caused by the reflection of sound waves from a surface back to the listener: the walls threw back the echoes of his footsteps. More example sentences.Synonyms. 1  There was no screaming, no running footsteps, no echoes across the stony surfaces. (plural echoes) A sound or sounds caused by the reflection of sound waves from a surface back to the listener: the walls threw back the echoes of his footsteps. More example sentences. Synonyms. 1  There was no screaming, no running footsteps, no echoes across the stony surfaces.