'baryonic' originates from New Latin and ultimately from Greek, specifically the Greek word 'barys', where 'barys' meant 'heavy' and the particle-forming suffix '-on' was used for elemental particles.

'baryonic' changed from the New Latin/modern scientific noun 'baryon' (from Greek 'barys' meaning 'heavy') and eventually became the modern English adjective 'baryonic' by adding the adjectival suffix '-ic' to 'baryon'.

Initially it referred to 'a heavy particle' (a baryon), but over time it evolved into the adjective meaning 'relating to or made of baryons'.