spectro- /spek-trō- or -tro-/

1. Signifying: spectre
2. Spectrum

• steel erector
• steel erectors
• steel-gray
• steel-grey
• steel-greys
• steelhead
• steel-headed
• steelheads
• steelier
• steeliest
• steeliness
• steelinesses
• steeling
• steelings
• steelman
• steelmen
• steel pan
• steel plate
• steel-plated
• steel plates
• steels
• steel trap
• steel traps
• steelware
• steelwares