FinnHun Finnish-Hungarian-English on-line dictionary and thesaurus

n (physics) Any of two or more forms of an element where the atoms have the same number of protons, but a different number of neutrons within their nuclei. As a consequence, atoms for the same isotope will have the same atomic number but a different mass number (atomic weight).

v (topology|transitive) To define or demonstrate an isotopy of (one map with another).