Definition of knobble in English:

knobble

noun

British
  • A small knob or lump on something.

    ‘he could feel the knobbles in the bark’
    • ‘She was so thin that she had knobbles of bone sticking out.’

Origin

Late Middle English: diminutive of knob.

Pronunciation

knobble

/ˈnɒb(ə)l/