A Wick Definition

Following the encyclopaedia Britannica 

The wick,

thread, strip, or bundle of fibres that, by capillary action, draws up the oil of a lamp or the melted wax in a candle to be burned. By 1000 bc, wicks of vegetable fibres were used in saucer-type vessels containing olive oil or nut oil in order to provide light, and by 500–400 bc these wicks were in general domestic use.

 

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wick in an oil lamp.