antrum /anˈtrəm/ (esp anatomy)

A cavity

• rootlessness
• rootlet
• rootlets
• rootlike
• rootling
• root mean square
• root nodule
• root nodules
• root parasite
• root parasites
• root planing
• root pressure
• root-prune
• root-pruned
• root-prunes
• root-pruning
• root rubber
• roots
• root sheath
• root sheaths
• rootsier
• rootsiest
• rootsiness
• rootsinesses
• roots music