A measure of both the productivity and publication impact of an entity, which depends on both the number of publications and the number of citations they have received.
Known as Hirsch's h-index, the h-index measures both quantity and impact of an individual's scientific research output. It can be calculated in Web of Science, Scopus, Google Scholar and other online services.The h-index is defined by how many (h) of a researcher’s publications have at least (h)citations each. An author with an h-index of 10 has at least 10 publications with 10 citations each.
Hirsch JE. PNAS (2005).