I. də̇ˈskȯid ə l, ˈdiˌs- adjective
Etymology: Late Latin discoides + English -al
: of, like, or producing a disk
discoidal cleavage
a discoidal sponge
as
a. of a gastropod shell : having the whorls form a flat coil
snails of the genus Planorbis are discoidal
b. : having the villi restricted to one or more disklike areas
most insectivores, bats, rodents, and primates have discoidal placentas
— see metadiscoidal
II. noun
( -s )
: a disk-shaped stone artifact found in No. America that was probably used by the Indians in games