ˌȯ(r)bəd.əˈlīd.(ˌ)ēz noun
Usage: capitalized
Etymology: New Latin, from Latin orbita track, rut, orbit + New Latin -o- + -lites -lite — more at orb
: a genus of foraminiferans of the Eocene that form thin, broad, circular disks containing numerous small chambers disposed concentrically about a few spirally wound primordial chambers