nutgall

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Related to oak apple: Oak Apple Day

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 ?
The legend surrounding Oak Apple Day stems back to the time when Charles II fled to the safety of France after the Battle of Worcester where he was to spend nine years in exile.
The tradition of wearing oak leaves or oak apples began during the Restoration, when Charles was back on the throne.
Among those injured was a 17-year-old driver, Miss Susan Thompson-Rogers, of Oak Apple Close, Stourport-on-Severn, who was being supervised by Mr George Hough, aged 47, of Knowbury, Ludlow.
Now the carvings of seven of the designs have been reproduced by Oak Apple Designs .
I had an interesting chat last night with a guy who's an archer; he and his friends dress up in medieval costume, and he told me about something called Oak Apple Day at Boscobel Hous e.
So-called oak apples are galls, and this year there seem to be a lot of these on the trees.
His supporters welcomed him by wearing oak leaves or oak apples in their hats, and Royal Oak Day was born.
28 The formations known as oak apples contain the larvae of which creature?