tan‧nin /ˈtænən, ˈtænɪn/ (
also tan‧nic acid /ˌtænɪk ˈæsəd/)
noun [uncountable][
Date: 1800-1900;
Language: French;
Origin: tanner; ⇒ tan1]
a reddish acid used in preparing leather, making ink etc
[TahlilGaran] Dictionary of Contemporary English ▲