~ 1 [ spru: ]
■ noun
1》 a channel through which metal or plastic is poured into a mould.
2》 a piece of metal or plastic which has solidified in a ~.
Origin
C19: of unknown origin.
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~ 2 [ spru: ]
■ noun a disease characterized by ulceration of the mouth and chronic enteritis, suffered by visitors to tropical regions.
Origin
C19: from Du. spruw 'thrush'.