Wikipedia
In heraldry, a trimount is a stylized depiction of three rounded hills or mountains, normally from the base of the image. The trimount (in German, Dreiberg) can be found in the heraldry of most European countries. A design of six hills can also be found in Swiss and Italian heraldry. Heraldic animals and flowers are often depicted on, coming up from, or above the trimount.
The coat of arms of Hungary depicts a trimount, as well as the coat of arms of Slovakia. The trimount in the Hungarian and Slovak coat of arms represents three mountain ranges of the Kingdom of Hungary: the Tatra, Fatra, and Mátra. The pointy trimount that appears on the Slovenian flag represents Triglav, the highest mountain in Slovenia.