Definition of protrusion in US English:

protrusion

noun

  • Something that protrudes; a protuberance.

    ‘a protrusion of rock jutted from the mountainside’
    • ‘With a typical hernia, there is a bulge resulting from the protrusion of an internal organ.’
    • ‘Follow routes on protrusions and ridges, and always ski slow and conservative.’
    • ‘They are coated with distinctive bumps and small protrusions against an overall veiled surface.’
    • ‘Despite its age, the walls were already pitted and scorched, the ceiling covered with small bumps and protrusions.’
    • ‘The concrete path is studded with local river rocks of varying sizes, from pointy pebbles to smooth skipping stones to softball-sized protrusions.’
    bump, lump, knob, hump, jut, projection, prominence, protuberance, overhang, eminence, ledge, shelf, ridge
    sticking out, jutting, projection, projecting, obtrusion, obtruding, prominence, protuberance
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Pronunciation

protrusion

/prəˈtro͞oZHən//prəˈtruʒən/