spiro-¹ /spī-rō-/ or spir- /spīr-/

Denoting spiral, as in spirochaete

• hound's-tooth
• hound-trailing
• hour
• hour-angle
• hour-angles
• hour-circle
• hour-circles
• hourglass
• hourglasses
• hour hand
• hour hands
• houri
• houris
• hourlong
• hourly
• hour of cause
• hourplate
• hourplates
• hours
• house
• house agent
• house agents
• house arrest
• houseboat
• houseboats