Something that mars or spoils; a blemish.

(pharmacology) a monoclonal antibody that targets mammary tumors

plural of marring

(steel-making) Relating to the production of martensite grains in steel.

Any of a number of small unmanned remote-controlled vehicles sent to the planet Mars to do scientific research.

An exploration mission to Mars launched in 2003 by the European Space Agency; consisted of the Mars Express Orbiter and the Beagle 2 lander.

(inorganic chemistry, obsolete) iron(III) sulfate

A bright, somewhat yellowish brown.

plural of Mars rover

A city, the county seat of Plymouth County, Iowa, United States.