marker : Idioms & Phrases
billiard marker
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noun a device for keeping the score in a game of billiards
WordNet
genetic marker
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noun a specific gene that produces a recognizable trait and can be used in family or population studies
WordNet
magic marker
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noun a pen with a writing tip made of felt (trade name Magic Marker)
felt tip; felt-tipped pen; felt-tip pen.
WordNet
yard marker
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noun (football) a marker indicating the yard line
