Definition of counterflow in English:

counterflow

Line breaks: coun¦ter|flow
Pronunciation: /ˈkaʊntəfləʊ/

Entry from British & World English dictionary

noun

A flow moving in the opposite direction to another: [as modifier]: a counterflow airstream that works to keep dust from entering the cooling system

Definition of counterflow in:

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Word of the day neoteny
Pronunciation: niːˈɒt(ə)ni
noun
retention of juvenile features in the adult animal