gallnut
Insect-induced tree growth
A gallnut is a hard, round growth that forms on oak trees and certain other plants when wasps or other insects lay eggs in the tissue.
The tree's reaction to the irritation produces these abnormal swellings.
Gallnuts are rich in tannic acid and were historically important in making ink and dyes: Medieval scribes wrote with iron gall ink made from crushed gallnuts.
Plant-derived astringent compound
- tannicHaving bark-derived acids
- leatherTanned animal skin
- hideConceal or pelt
- tanningCuring hides or bronzing
tanbark · tannery · mordant · preservative · astringent · fulling · curing · rawhide
Tissue-contracting agent
- hemostaticArrests blood flow
- anti-inflammatoryInflammation-reducing agent
- herbalRelating to medicinal plants
- remedyCurative treatment or fix
therapeutic · topical · poultice · traditional · healing · antiseptic · medicinal · tincture
Writing fluid
- dyePigment for changing hues
- pigmentColor-imparting material
- colorantSubstance that imparts hue
- fabricWoven or knit material
textiles · colorfast · staining · dyer · fastness · manuscript · calligraphy · sepia
tannin
Plant-derived astringent compound
tanning · tanbark · tannery · mordant · preservative · astringent · fulling · curing · rawhide · parchment
astringent
Tissue-contracting agent
- hemostaticArrests blood flow
- anti-inflammatoryInflammation-reducing agent
- herbalRelating to medicinal plants
remedy · therapeutic · topical · poultice · traditional · healing · antiseptic · medicinal · tincture · extract
ink
Writing fluid
fabric · textiles · colorfast · staining · dyer · fastness · manuscript · calligraphy · sepia · writing
oviposition
Depositing eggs externally
infestation · swelling · deformity · excrescence · reaction · host · emergence · chamber · pupation · insect