Any marking or object that catches the eye to provide quick reference.
Someone who guides, especially someone hired to show people around a place or an institution and offer information and explanation, or to lead them through dangerous terrain.
A grooved director for a probe or knife in surgery.
A sign that guides people; guidepost.
A blade or channel for directing the flow of water to the buckets in a water wheel.
A spirit believed to speak through a medium.
A member of a group marching in formation who sets the pattern of movement or alignment for the rest.
A document or book that offers information or instruction; guidebook.
to serve as a guide for someone or something; to lead or direct in a way; to conduct in a course or path.
to act as a guide.
to exert control or influence over someone or something.
to supervise the education or training of someone.
to steer or navigate, especially a ship or as a pilot.
A set of labels applied to the various objects in a system.
The introduction of a traceable chemical group (e.g., containing an isotope or a fluorescent dye) into a protein or other biomolecule of interest so it can be tracked or quantified during experimental analysis.