Occurring in or representing two distinct forms.
Mid 19th century: from Greek dimorphos (from di- ‘twice’ + morphē ‘form’) + -ic.
“In this sexually dimorphic species, only the males have wings”
Itinerant (adj) (noun)
Travelling from place to place. / A person who travels from place to place.
Late 16th century (used to describe a judge travelling on a circuit): from late Latin itinerant- ‘travelling’, from the verb itinerari, from Latin iter, itiner- ‘journey, road’.