| bracken poisoning | A disease of cattle caused by long-term, low-level consumption of the bracken fern (Pteridium aquilinum) and characterised by haemorrhages or tumours in the bladder. Synonym: bracken poisoning. (05 Mar 2000) |
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| bracken staggers | A condition occurring in horses as a result of eating bracken; characterised by locomotor incoordination; due to thiamin deficiency (bracken contains thiaminase). (05 Mar 2000) |