English

Noun

counterflow ‎(countable and uncountable, plural counterflows)

1. A flow in the opposite direction; or the flow of two fluids in opposite directions
   • 2009, January 5, Using the Earth and Sun to Provide Home Heating:

     We, too, used […] a counterflow heat exchanger to warm incoming fresh air.

Verb

counterflow ‎(third-person singular simple present counterflows, present participle counterflowing, simple past and past participle counterflowed)

1. To flow in the opposite direction