obturbinate
/ɒbˈtəːbɪnət/ /ɒbˈtəːb(ə)nət/ /ɒbˈtəːbɪneɪt/Chiefly Botany
adjective
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.