Indicator of specific genetic trait.

Gene enabling identification of transformants.

Permanent ink in felt-tip pen.

Substances indicating presence of cancer.

Specific gene indicating particular cells.

Genes indicative of specific cells.

Indicator of distance along road.

(countable) A type of felt-tip pen used to create permanent water-resistant writing on a surface.

A tombstone or other permanent fixed object to indicate the location of a grave.

Diagram representing syntactic structure relationships.

Indicator delineating limits or ownership.

In molecular biology and other fields, a molecular marker is a molecule, sampled from some source, that gives information about its source.

Words signaling structure in conversation.