Mathematics is omnipresent and so is mathematical lexis. Because of the fact that professional terms are the element of specialized languages that are most likely to (and imperceptibly) infiltrate into the general language, they should be appropriately recognized in general dictionaries and in dictionaries directed to learners of a chosen language as a foreign language. However, in the case of German in recent years (2016–2020), the most widely-used form of monolingual German dictionaries as foreign ones are pictorial dictionaries. Thus, the question is, can mathematical terminology be presented by the means of pictures? The purpose of this article is to verify which mathematical lexemes are included in the selected German pictorial dictionary as a foreign language and how they have been developed in its micro- and macrostrukture. Lexicographical material is Bildwörterbuch Deutsch als Fremdsprache (2016) dictionary.