noun: Initialism of Plant Breeding Institute - a founding unit of the John Innes Centre
noun: (chemistry) Acronym of polybenzimidazole. [(chemistry) a polymer, containing imidazole repeat units, prepared from tetraaminobiphenyl and diphenyl isophthalate; it does not melt or ignite, so is used in fire-resistant materials]
noun: Initialism of poor bloody infantry - the infantry of the British Army
