Correct spelling for the English word "Rubidic" is [ɹuːbˈɪdɪk], [ɹuːbˈɪdɪk], [ɹ_uː_b_ˈɪ_d_ɪ_k] (IPA phonetic alphabet).
Rubidic is not a widely recognized term in the English language; therefore, a dictionary definition specific to "rubidic" does not exist. It is possible that the term "rubidic" is a neologism or a term specific to a specialized field that is not documented comprehensively in dictionaries.
However, based on the root word "rubidium," we can speculate about a potential definition. Rubidium is a chemical element, classified as an alkali metal, with the atomic number 37. It is highly reactive and is known for its vibrant red color when in flame. If we consider the adjective form of rubidium, "rubidic," it could pertain to something related to or derived from rubidium.
In a scientific context, "rubidic" may be used to describe compounds, reactions, or properties directly associated with rubidium. For instance, a rubidic compound could refer to a chemical compound that contains rubidium, or a rubidic reaction might refer to a specific chemical reaction involving rubidium. However, without more context or specific usage, it is difficult to give an accurate definition.
In conclusion, "rubidic" does not have an established dictionary definition, but it is probably used as an adjective to describe something related to rubidium or derived from it in scientific fields.