During the 1930s, the city's air marker guided pilots to the nearby airfield by showing directions and distances painted on the rooftops.

The geologists identified several marker horizons that helped date the volcanic ash layers.

Geologists identified a distinctive marker horizon across the basin that allowed them to correlate sedimentary layers over hundreds of kilometers.

She shaded the illustration with a dry marker to give the watercolor piece a bright, ink-like finish.

After several trials, the chemists improved the Marker degradation to boost cortisone production from plant steroids.

In many languages, the infinitive marker attaches to the verb stem to form the full infinitive.

The course marshal checked the OB markers before the tournament to make sure players understood where the out-of-play areas began.

Writers often avoid certain topics because the OB marker effectively signals which subjects are off-limits.

The researchers used a specific genetic marker to track the inheritance of the disease through the family.

She labeled every box in the attic with a Magic Marker before the move.