Trøndersk, also known as trøndermål, trøndsk and trønder, is a Norwegian dialect, or rather a group of several sub-dialects. As it is the case with all Norwegian dialects, it has no standard orthography, and its users write either Bokmål, or in the case of 0.6% Nynorsk.
The word trøndersk is an adjective describing a Trønder (a person from Trøndelag) or anything coming from or relating to Trøndelag (including the dialect).
Some of the more conspicuous variations of these dialects of Norwegian, in addition to the aforementioned apocope and palatalization, are that most of the personal pronouns are pronounced differently than in Standard Norwegian, e.g. Trondheim dialect: 1st person singular nominative /æː/, commonly rendered as "æ" (Standard Norwegian "eg" (Nynorsk) / "jeg" (Bokmål)), or 2nd person plural accusative /dɔkː/ or /dɔkːɛr/, commonly spelled "dokker" or "dåkker" (Standard Norwegian "dykk" (Nynorsk) / "dere" (Bokmål)). Variation among personal pronouns are common in most Norwegian dialects.
In the subdialect of the traditional district of Namdalen, Old Norse /aː/ is often realized as a wide diphthong [ɑu]. This is also the case in the interior dialect Sogn, as well as in Jamtlandic, the dialect of Voss, and the Icelandic language.