Definition of penicillamine in US English:

penicillamine

noun

Chemistry Pharmacology
  • A crystalline, sulphur-containing amino acid produced by the hydrolysis of penicillins, used pharmacologically as a chelating agent to remove heavy metals such as copper from the body, and as an anti-inflammatory agent, especially for rheumatoid arthritis; 2-amino-3-methyl-3-mercaptobutanoic acid, (CH₃)₂C(SH)CH(NH₂)COOH.

Origin

1940s; earliest use found in Edward Penley Abraham (1913–1999), biochemist. From penicill- + amine.

Pronunciation

penicillamine

/ˌpɛnɪˈsɪləmiːn/