1. Characterized by or in accordance with some formula

See also: conventional

• Spirodela polyrrhiza
• spirogram
• spirograph
• spirogyra
• spirometer
• spirometry
• spironolactone
• spirt
• spirula
• Spirula peronii
• Spirulidae
• spirulina
• spiry
• spit
• spit and polish
• spit curl
• spit out
• spit up
• spital
• spitball
• spitchcock
• spite
• spiteful
• spitefully
• spitefulness