Definition of clonus in US English:

clonus

noun

Medicine
  • Muscular spasm involving repeated, often rhythmic, contractions.

    • ‘Strictly speaking this is classed as clonus rather than tremor.’
    • ‘Medication is indicated when stiffness, spasms, or clonus interferes with function or sleep.’
    • ‘The patient should be tested for deep tendon reflexes and clonus.’
    • ‘He was getting clonus in his quads which made him more and more unsteady.’
    • ‘Physical examination revealed left ankle clonus, positive Babinski sign on the left, and left lower extremity weakness.’
    muscle spasm, muscular spasm, muscle contraction, muscular contraction, pang, twinge
    View synonyms

Origin

Early 19th century: from Greek klonos ‘turmoil’.

Pronunciation

clonus

/ˈkloʊnəs//ˈklōnəs/