(ˈ)spī|rif(ə)rəs adjective
Etymology: probably from New Latin spirifer spiriferous (from spir- + -fer -ferous) + English -ous
1.
a. : having a spiral part or organ
b. : spired
2.
[ spirifer + -ous ]
: containing or characterized by brachiopods of the suborder Spiriferacea — used especially of rock