'homomeric' originates from Greek via New Latin/modern scientific coinage, specifically from the combining forms 'homo-' (Greek 'homos', meaning 'same') and '-meric' from Greek 'meros' (meaning 'part').

'homomeric' was formed in modern scientific English/New Latin by combining the Greek-derived prefix 'homo-' and the combining form '-meric' (from 'meros') to describe structures made of similar parts; it arose as a technical term in biology and chemistry in the 19th–20th century.

Initially the components of the roots signified 'same' and 'part'; over time the coined adjective came to mean specifically 'composed of identical subunits' in biological and chemical contexts.