society > occupation and work > materials > derived or manufactured material > vegetable extracts or preparations > [noun] > mass left after preparation of extracts (3)
= extractive, n. 2. Obsolete.
‘The brown insoluble mass of doubtful composition, left after the preparation of vegetable extracts’ (Wagstaffe).
the insoluble residue left when vegetable matter is boiled alternately in dilute acids and alkalis, corresponding roughly to its indigestible part.