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geeldikkop

A South African term (from Afrikaans, literally 'yellow thick head') for a toxic condition in livestock, particularly sheep and cattle, caused by certain plants — primarily species of Tribulus.

ˈɡildˌkɑp127 viewsLast reviewed Jun 29, 2026+ Add a definition
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#1·Apr 28, 2026

A South African term (from Afrikaans, literally 'yellow thick head') for a toxic condition in livestock, particularly sheep and cattle, caused by certain plants — primarily species of Tribulus. The condition causes photosensitization and liver damage, resulting in swelling around the head. The term is used in South African agricultural and veterinary contexts and is essentially a practical, technical word rather than slang. It reflects the Afrikaans tradition of descriptively naming plant-related livestock diseases.

The farmer called the vet immediately when he noticed the swelling — he suspected geeldikkop from the Tribulus growing near the fence.
Origin: From Afrikaans 'geel' (yellow) + 'dik' (thick/swollen) + 'kop' (head), describing the characteristic symptom of swelling and yellowing around the head in affected animals. Editorial expansion authored on Slangora.
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#2·Apr 27, 2026

(South Africa) tribulosis.

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