subsellium /sub-selˈi-əm/

1. A seat in a Roman amphitheatre
2. A misericord

• back-calculate
• back-calculated
• back-calculates
• back-calculating
• back-calculation
• backcast
• backcasting
• backcasts
• back catalogue
• back catalogues
• back-chain
• back channel
• back channels
• backchat
• backchats
• backchatted
• backchatting
• back-cloth
• back-cloths
• back-comb
• back-combed
• back-combing
• back-combs
• back-country
• backcourt