mesoconch

adjective

meso·​conch ˈmez-ə-ˌkäŋk  ˈmēz- 

ˈmēs-, 

ˈmes-

variants also mesochonchic

-ˈkäŋk-ik 

: having the orbits moderately rounded with an orbital index of 76.0 to 84.9

mesoconchy

-ˌkäŋ-kē 

noun

plural mesoconchies