spiroid
adjective
spi·roid
ˈspīˌrȯid
variants or less commonly spiroidal
(ˈ)spī¦rȯidᵊl
: resembling a screw : spiral in form
Word History
Etymology
spiroid from New Latin spiroïdes, from Greek speiroeidēs, from speira coil, twist + -oeidēs -oid; spiroidal International Scientific Vocabulary spiroid + -al