Acescent

• (a.) Turning sour; readily becoming tart or acid; slightly sour. • (n.) A substance liable to become sour.
Found on http://thinkexist.com/dictionary/meaning/acescent/

Acescent

A·ces'cent adjective [ Latin acescens , -entis , present participle of acescere to turn sour; inchoative of acere to be sour: confer French acescent . See Acid .] Turning sour; readily becoming tart or acid; slightly sour. Faraday.
Found on http://www.encyclo.co.uk/webster/A/18

Acescent

A·ces'cent noun A substance liable to become sour.
Found on http://www.encyclo.co.uk/webster/A/18
No exact match found