The Collaborative International Dictionary
Gallotannic
Gallotannic \Gal`lo*tan"nic\, a. [Gall nutgall + tannic.] (Chem.) Pertaining to the tannin or nutgalls.
Gallotannic acid. See Tannic acid, under Tannic.
Wiktionary
gallotannic
a. (context chemistry archaic English) Pertaining to the tannin or nutgalls.