From Latin quercus (“oak”) + tannin. <span class="searchmatch">quercitannin</span> (uncountable) Tannic acid derived from oak galls....
From <span class="searchmatch">quercitannin</span> + -form (“formaldehyde”). quercitannoform (uncountable) (obsolete) Tannoform derived from <span class="searchmatch">quercitannin</span> or quercitannic, rather than...