gallotannic acid 【化】 (┢)单宁酸; 鞣酸
【医】 没食子鞣酸
Gallotannic \Gal`lo*tan"nic\, a. [Gall nutgall + tannic.]
(Chem.)
Pertaining to the tannin or nutgalls.
{Gallotannic acid}. See {Tannic acid}, under {Tannic}.
Tannic \Tan"nic\, a.
Of or pertaining to tan; derived from, or resembling, tan;
as, tannic acid.
{Tannic acid}. (Chem.)
(a) An acid obtained from nutgalls as a yellow amorphous
substance, {C14H10O9}, having an astringent taste, and
forming with ferric salts a bluish-black compound, which
is the basis of common ink. Called also {tannin}, and
{gallotannic acid}.
(b) By extension, any one of a series of astringent
substances resembling tannin proper, widely diffused
through the vegetable kingdom, as in oak bark, willow,
catechu, tea, coffee, etc.