Whole oat groats chopped into pieces.

(medicine) Initialism of overactive bladder.

A small oak native to Greece and Asia Minor, Quercus infectoria, best known for the galls on its leaves that are harvested as a source of tannins.

Alternative form of bloody oath

(Australia, New Zealand, colloquial) Most certainly; you bet; used to intensify an affirmative response.

Alloxylon flammeum (Queensland waratah) / Carnarvonia araliifolia, of Australia / Grevillea banksii (dwarf silky oak, white silky oak) / Alloxylon wickhamii (syn. Oreocallis wickhamii)

plural of oak fern

plural of oak leaf

plural of oak-tag

plural of oath-ring