Definition of spiro- in English:

spiro-

Syllabification: spiro-

combining form

1Spiral; in a spiral: spirochete
2 Chemistry Denoting a molecule with two rings with one atom common to both: spironolactone

Origin

from Latin spira, Greek speira 'a coil'.

Definition of spiro- in:

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Word of the day retroflex
Pronunciation: ˈrɛtrə(ʊ)flɛks
adjective
turned backwards