grease pencil

noun

a pencil of pigment and compressed grease encased in a spiral paper strip that can be partially unwound to expose a new point and used especially for writing on glossy surfaces.

Mark the pipette (with the grease pencil) with the distinctive number of the serum and place it in the glass box or tray.

Len crossed off each day on their wall calendar with an emphatic black grease pencil.

Mike made a dot on the screen with a grease pencil where the pip showed.

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