spir-
combining form
or spiri- or spiro-
Etymology: Late Latin spir-, from Latin spira — more at spire
1. : coil : twist
< Spiranthes >
< spirivalve >
< Spirochaeta >
2. : a chemical compound that contains one or more systems of two rings having a single atom in common with a resulting figure-eight arrangement of atoms
< spiropentane >
or spiri- or spiro-
1.
< Spiranthes >
< spirivalve >
< Spirochaeta >
2.
< spiropentane >