Marker

n.

1.

(Mil.) One who or that which marks.

Noun	1.	marker - some conspicuous object used to distinguish or mark something; "the buoys were markers for the channel"
	2.	marker - a distinguishing symbol; "the owner's mark was on all the sheep" Synonyms: marking, mark
	3.	marker - a writing implement for making a mark

accountant, amanuensis, arch, archivist, barrow, beacon, beam, bench mark, bookkeeper, bookmark, boundary stone, brass, bust, cairn, catstone, cenotaph, clerk, column, cromlech, cross, cup, cyclolith, documentalist, dolmen, engraver, fan marker, filing clerk, flare path, footstone, grave, gravestone, headstone, hoarstone, inscription, landmark, librarian, lighthouse, lightship, mark, mausoleum, megalith, memento, memorial, memorial arch, memorial column, memorial statue, memorial stone, menhir, milepost, milestone, monolith, monument, mound, necrology, notary, notary public, obelisk, obituary, pharos, pillar, plaque, platform, prize, prothonotary, pylon, pyramid, racon, radar beacon, radio beacon, record clerk, recorder, recordist, register, registrar, reliquary, remembrance, ribbon, rostral column, scorekeeper, scorer, scribe, scrivener, seamark, secretary, shaft, shrine, stela, stenographer, stone, stonecutter, stupa, tablet, testimonial, timekeeper, tomb, tombstone, tope, tower, trophy, watchtower, wind cone, wind indicator, wind sock