Definition of monticule in US English:

monticule

noun

rare
  • 1A small mountain or hill.

    • ‘And so, she found shelter under a mossy nook nearby that protruded from a monticule of earth.’
    1. 1.1 A small mound caused by a volcanic eruption.
      • ‘The tourist spot is a monticule, or minor cone of a volcano.’

Origin

Late 18th century: from French, from late Latin monticulus, diminutive of mons, mont- ‘mountain’.

Pronunciation

monticule

/ˈmän(t)əˌkyo͞ol//ˈmɑn(t)əˌkjul/