disciform
/ˈdɪsɪfɔːm/adjective
1Having the form of a disc; disc-shaped, discoidal; (Medicine ) characterized by lesions of this form.
2 Botany. Of a composite flower: composed of fertile disc florets with reduced or filiform marginal florets, superficially similar to a discoid flower.
Origin
Early 19th century. From post-classical Latin and scientific Latin disciformis from disci-, combining form of classical Latin discus + -formis.