1.
organic
Relating to or derived from living matter; in agriculture, grown without synthetic chemicals.
This store sells rice and vegetables grown through organic farming.
有機農業 = organic farming
有機 means "organic" and is used as a prefix in both agricultural and scientific contexts. The kanji literally mean "having (有) living structure (機)."
AGRICULTURAL COMPOUNDS:
SCIENTIFIC COMPOUNDS:
ANTONYM:
無機 (inorganic) — as in 無機化学 (inorganic chemistry).
HOMOPHONE:
Do not confuse with 勇気 (courage) — same reading, different kanji.