1. An image of the sun using light of particular wavelengths

Derived forms: spectroheliograms

• stratagem
• strategian
• strategic
• Strategic Arms Limitation Talks
• strategic buyout
• strategic intelligence
• strategic warning
• strategical
• strategically
• strategics
• strategist
• strategy
• Stratford
• Stratford-on-Avon
• Stratford-upon-Avon
• strath
• strathspey
• stratification
• stratified
• stratified language
• stratified sample
• stratified sampling
• stratiform
• stratify
• stratigraphy