See also: Urinal in Pictorial Dictionary of Heraldry.
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Urinal In A Basket §
A phial of bodily fluid caried in a wire enclosure. Visual analysis of a patient's urine was an important diagnostic tool in medieval medicine.
Default orientation: upright. No proper coloration.
Source: Heraldry For the Local Historian and Genealogist. Artist unknown. (Arms of Dr Louys Caerlyon, 1483.)