monaural /mon-öˈrəl/

1. Having or using only one ear
2. Relating to one ear
3. (of a radio broadcast, etc) giving the effect of sound from a single direction, not stereophonic

• oil-burning
• OILC
• oil-cake
• oilcan
• oilcans
• oilcloth
• oilcloths
• oil colour
• oil colours
• oil-control ring
• oil-cup
• oil-cups
• oil drum
• oil drums
• oiled
• oil engine
• oil engines
• oiler
• oileries
• oilers
• oilery
• oilfield
• oilfields
• oil-filled cable
• oil-fired