Martian

"Martian" was a generic term for any inhabitant of the planet Mars. The term was applied to several species, (TV: Cold War, PROSE: The Secret of the Mountain, et al) in part because of the planet's multiple conflicting and overlapping timelines (PROSE: The Last Resort) and hypothetical realities (PROSE: The Ninnies on Putney Common)

Native Martians
Several sentient species evolved on Mars. (TV: The Ice Warriors, The Seeds of Death, et al) These included the Ice Warriors, (TV: The Ice Warriors) who the Eleventh Doctor called "the Martian race"; (TV: Cold War) the Gandorans; (AUDIO: Lords of the Red Planet) the Ninnies; (PROSE: The Ninnies on Putney Common) and another type simply called "Martians." (PROSE: Enter Wildthyme)

There were also non-sentient species that evolved on Mars, such as Martian fungi (TV: The Seeds of Death) and at least one type of virus. (TV: The Waters of Mars)

Human Martians
By the 22nd century, Mars had been colonised by humans, who, according to one account, pushed the native Ice Warriors into poverty. (PROSE: Fear Itself) Another account claimed that humanity had colonised Mars unimpeded when — in the words of Harold — after "something to do with T-Mat on the Moon", "centuries" before the 23rd century, a whole fleet of Ice Warriors were — according to what Gregson Grenville had learnt in school — "all melted when their invasion fleet spiralled into the sun".

This account showed extant Ice Warriors, but all were in suspended animation for — according to the Eighth Doctor — "many millions of years" during the 22nd century. (AUDIO: Deimos)

According to another account, the Tenth Doctor described the Ice Warriors as "legends on Mars from long ago" after the first off-world human colony was founded on Mars in 2058. (TV: The Waters of Mars)

Once humanity had made Earth itself uninhabitable, the Usurians saw to it that the humans could move to Mars. (TV: The Sun Makers)

Many humans considered themselves "Martian" after colonisation, as there came a point when humans were regularly being born there. The human second-in-command of the ADF, Reb Shavron, referred to himself as a Martian. (PROSE: Terror Task Force)

By the year 200,000, Mars was home to a university of questionable reputation, with a nurse aboard Satellite Five associating it with the "Martian boondocks". (TV: The Long Game)

Martian droids
At some point, Martian droids were paid in something called "default". (TV: Bad Wolf)

As colloquialism
Prior to colonisation, many humans simply interchanged the word Martian for the term alien — much like "flying saucer" was used as a generic term for alien spacecraft. For example, Donna Noble referred to the Tenth Doctor as a Martian before understanding he was, in fact, a Time Lord. (TV: The Runaway Bride) Likewise, Lucie Miller suggested to Eighth Doctor that she could be a Martian if she was alien. (AUDIO: Blood of the Daleks)

When the Eleventh Doctor said the Cuculus were alien, Harry Houdini asked if they were Martians. (PROSE: Houdini and The Space Cuckoos)

Misidentified Martians
Ostensibly because of this penchant to imagine Mars as a likely source of alien life, some humans occasionally misidentified other species for Martians, just as Donna had done with the Tenth Doctor. Lance Bennett passed this misidentification to the Empress of the Racnoss, however, the Doctor revealed to her that he was actually one of her hated enemies, the Gallifreyans. (TV: The Runaway Bride)

Daniel Llewellyn, along with the whole world, thought that the Sycorax were from Mars until Major Blake told him that Martians looked completely different. (TV: The Christmas Invasion)

Patrick also initially thought that the Centuripede came from Mars to read other people's mail. (TV: The Last Oak Tree)

Jerome Weismuller believed that the Bannermen were "hitmen from Mars". (TV: Delta and the Bannermen)

Daleks Versus the Martians
The non-DWU story Daleks Versus the Martians featured Dr. Who, Susan and Louise from the movies, Dr. Who and the Daleks and Daleks' Invasion Earth 2150 A.D., encountering a different species of native Martians to those encountered by the Doctor in the standard Doctor Who universe.