geologiaj
Geologiaj is the plural form of the Esperanto adjective geologia, meaning geological. It is used to describe multiple geological features, phenomena, or topics and does not signify a separate scientific field by itself. In Esperanto, adjectives agree with the nouns they modify in number; the plural form geologiaj is used with plural nouns. When a noun phrase is in the accusative case, the ending -n is added to the entire phrase, yielding forms such as geologiajn fenomenojn.
Etymology and grammar: geologia derives from the root related to geology, combined with the standard Esperanto
Usage: Geologiaj appears in Esperanto texts dealing with earth sciences, geography, and related fields when referring
Relation to other terms: The noun for the science is geologio (geology), with plural geologioj. A person
See also: geologio, geologio (geology); geologo (geologist).