Definition of keelless in English:

keelless

adjective

See keel

‘Physically, breeding stock should have keelless breasts and broad backs.’
  • ‘This is something you simply cannot do in a keelless flat bottom boat.’
  • ‘The carapace (upper shell) is olive to dark brown to almost black, patternless, smooth and keelless.’
  • ‘The first keelless outrigger eights were raced in 1852.’
  • ‘The keelless Reed Boat was used for river and coastal transport in Egypt and Mesopotamia.’