MathLexicon is an innovative tool for creating an ecosystem for generating infinitely many math-rich neologisms. A fun activity for any level key stages. It prompts users to upload maths word parts and add definitions to them, or to existing word parts. Users can also generate neologisms from existing word parts and roots they enter, which MathLexicon defines for them. MathLexicon goes well with exploration of topics such as the metric system (based on suffixes), polygons, and large numbers. It helps to relieve tension and help students any time complicated math language comes up.