nutgall


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nut·gall

(nŭt'gahl),
An excrescence on Quercus infectoria (family Fagaceae) and sometimes other species of Quercus (oak), caused by the deposit of the ova of a fly, Cynips gallae tinctorae; an astringent and styptic because of the tannin it contains.
Synonym(s): gall (3) , galla, oak apple

nutgall

(nŭt′gawl)
A growth on certain oak trees produced by insect eggs and larvae. Gallic and tannic acids are obtained from these growths.
References in periodicals archive ?
He reports that prominent Roman physician Galen attempted to improve the appearance of patient's eyes by using a heated metal rod to cauterise the surface of the eyeball, after which he applied powdered nutgalls or pomegranate bark mixed with a copper salt to the area.
A man of his position, who has sunk until today he must pick up nutgalls for other people, and buy skins in the villages for the Jews.