orgaanilisest
Orgaanilisest is the elative singular form of the Estonian adjective orgaaniline, meaning organic. It is used to indicate origin or source of a noun in sentences where the noun is in the elative case, for example orgaanilisest ainest (from organic matter) or orgaanilisest ühendist (from an organic compound). In Estonian, adjectives agree with the noun in number and case, so the form changes accordingly; the elative singular ends with -st.
In scientific and academic writing, orgaanilisest is common when contrasting organic with inorganic concepts, such as
Usage and scope: orgaanilisest appears in contexts where the emphasis is on source or composition relative