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spiral of Archimedes
spiral staircase
spiran
spirant
spire (1)
spire (2)
spirea
spirelet
spirillum
Spirit
spirit
spirit gum
spirit lamp
spirit level
spirit varnish
spirited
spiritism
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spirillum

spi·ril·lum [ spī rílləm ] (plural spi·ril·la [ spī ríllə ])


noun 
Definition:
 
spiral or curved bacterium: a spiral-shaped or curved bacterium with a rigid body, that lives only in the presence of oxygen. Genus Spirillum.

[Late 19th century. < modern Latin, "little spiral" < Latin spira (see spire2)]

spi·ril·lar adjective
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