An elongated swollen or tuberous gall on the branches of the grapevine, caused by a small reddish-brown weevil (Ampeloglypter sesostris) whose larvae inhabit the galls.

A large yellowish green gall, somewhat tinged with red, consisting of a mass of irregular swellings on the stems and leaves of grapevines, produced by the larva of a small two-winged fly (Lasioptera vitis).

(obsolete) A bruise on the top of the chine of the back of a horse, behind the saddle.

gall midge

plural of gall mite

A gall that develops on the pedunculate oak, induced by the wasp Andricus quercuscalicis.

The gall produced by the leaves of the Aleppo oak, Quercus infectoria, in response to the larvae of a species of gall wasp, Cynips quercusfolii, and which has been harvested for thousands of years as a concentrated source of tannins for use in high-quality inks, in medicine, etc.

plural of gall gnat

(idiomatic) bitterness and resentment

A defect in timber, caused by damage to the bark of the young tree.