Definition of obturbinate in English:
obturbinate
adjective ɒbˈtəːbɪnətɒbˈtəːb(ə)nətɒbˈtəːbɪneɪt
Botany Inversely turbinate; having the shape of a top with the pointed end upwards.
Origin
Late 19th century; earliest use found in The Century Dictionary. From ob- + turbinate.